um1878 user manual - stmicroelectronics...memory, 20-kbyte ram, 6-kbyte eeprom, touch sensing, usb...

May 2018 UM1878 Rev 2 1/64

1

UM1878User manual

Evaluation board with STM32L073VZ MCU

Introduction

The STM32L073Z-EVAL evaluation board is designed as a complete demonstration and development platform for the STMicroelectronics Arm® Cortex®-M0+ core-based STM32L073VZT6 microcontroller with three I2C buses, two SPI interfaces, four USART interfaces, one UART interface, 12-bit ADC and DAC, LCD driver, up to 192-Kbyte Flash memory, 20-Kbyte RAM, 6-Kbyte EEPROM, touch sensing, USB OTG FS, LCD controller, SWD debugging support. This evaluation board can be used as reference design for user application development but is not considered as a final application.

The full range of hardware features on the board help the user to evaluate all peripherals (USB OTG FS, USART, 12-bit ADC and DAC, color TFT LCD, LCD glass, low-power UART, IrDA, microSD™ card, touch sensing slider, pressure measurement, temperature measurement, LC sensor metering) and develop his applications. The extension headers offer the possibility to connect a daughterboard or a wrapping board for a specific application.

An embedded ST-LINK/V2-1 debugger facilitates the software development and the programming of the STM32L073VZT6 microcontroller.

Figure 1. STM32L073Z-EVAL evaluation board

Picture is not contractual.

www.st.com

http://www.st.com

Contents UM1878

2/64 UM1878 Rev 2

Contents

1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.1 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

7.1.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.1.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.2 SWD connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.3.1 Adjustable power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

7.4 Clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7.5 Reset sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7.6 Boot option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7.7 USB FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.7.1 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.8 SMBus temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.8.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20


7.9 RS-232 USART2 and IrDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.9.1 RS-232 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.9.2 IrDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.9.3 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21


7.10 RS-232 LPUART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7.10.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

UM1878 Rev 2 3/64

UM1878 Contents

4


7.11 Virtual Com Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7.11.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22


7.12 MicroSD card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

7.12.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22


7.13 Analog input ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22


7.14 Analog output DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

7.14.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25


7.15 TFT LCD display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.15.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26


7.16 User LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.17 Input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.18 RF-EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.19 LCD glass display module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.19.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.20 LC sensor metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.20.1 LC sensor metering principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.20.2 LC sensor metering description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.20.3 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.21 Pressure sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.21.1 Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.21.2 Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.21.3 Pressure computation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.21.4 Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.21.5 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38


7.22 Touch sensing slider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.22.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.23 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.24 IDD auto-measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Contents UM1878

4/64 UM1878 Rev 2

7.24.1 Analog section description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.24.2 Difference amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.24.3 Digital section description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.1 RS-232 connector CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.2 Power connector CN18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.3 LCD glass daughterboard connectors CN10 and CN14 . . . . . . . . . . . . . 45

8.4 ST-LINK/V2-1 programming connector CN15 . . . . . . . . . . . . . . . . . . . . . 46

8.5 ST-LINK/V2-1 USB Type B connector CN17 . . . . . . . . . . . . . . . . . . . . . . 46

8.6 SWD connector CN12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

8.7 Trace debugging connector CN11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

8.8 MicroSD connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.9 RF-EEPROM daughterboard connector CN3 . . . . . . . . . . . . . . . . . . . . . 49

Appendix A Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Appendix B Mechanical dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

UM1878 Rev 2 5/64

UM1878 List of tables

5

List of tables

Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Table 2. Power related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Table 3. 32.768 KHz crystal X2 solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Table 4. 8 MHz crystal X1 solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Table 5. Boot related switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Table 6. Boot related jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Table 7. Temperature sensor related solder bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table 8. RS-232 and IrDA jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Table 9. MicroSD connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Table 10. Analog input related jumper JP2 settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Table 11. TFT LCD connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Table 12. User LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Table 13. Input devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Table 14. LCD glass segments 21 to 28 mapping table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Table 15. LCD glass segments 0 and 29 to 39 mapping table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Table 16. LCD glass segments 1 to 8, 15, 18 to 20 mapping table . . . . . . . . . . . . . . . . . . . . . . . . . . 29Table 17. LCD glass segments 9 to 14, 16, 17 mapping table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Table 18. LCD glass related jumpers and solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Table 19. Solder bridges and jumpers for LC sensor metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Table 20. Sensor differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Table 21. Differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Table 22. Single output voltage to the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Table 23. Touch sensing related solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Table 24. Extension connectors pin-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Table 25. IDD auto-measurement related jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Table 26. RS-232 connector CN6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Table 27. LCD glass daughterboard connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Table 28. USB type B connector CN17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Table 29. SWD debugging connector CN12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Table 30. Trace debugging connector CN11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Table 31. MicroSD connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Table 32. RF-EEPROM daughterboard connector CN3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Table 33. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

List of figures UM1878

6/64 UM1878 Rev 2

List of figures

Figure 1. STM32L073Z-EVAL evaluation board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. Hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 3. STM32L073Z-EVAL evaluation board (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 4. USB Composite device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 5. Pin-out of 5 V DC adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 6. Location of ADC input connector CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 7. Provision for filter implementation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 8. Location of DAC output CN3 and JP2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 9. Provision for filter implementation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 10. LCD glass board in LCD position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 11. LCD glass board in IO position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 12. LCD segment names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Figure 13. Functional block diagram of LC sensor metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Figure 14. LC sensor metering schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Figure 15. Differential amplifier with offset correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 16. Solder bridges settings to enable the touch slider (red = closed, green = opened) . . . . . . 39Figure 17. Figure: analog section schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Figure 18. Difference amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Figure 19. Digital section schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Figure 20. RS-232 connector CN6 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Figure 21. Power supply connector CN18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Figure 22. USB type B connector CN17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Figure 23. Trace debugging connector CN12 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Figure 24. Trace debugging connector CN11 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Figure 25. MicroSD connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Figure 26. RF-EEPROM daughterboard connector CN3 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . 49Figure 27. STM32L073Z-EVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Figure 28. MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51Figure 29. LCD glass external connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Figure 30. Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Figure 31. Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Figure 32. TFT microSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Figure 33. USART_LPUART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Figure 34. Pressure sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Figure 35. LC sensor metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Figure 36. IDD measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Figure 37. SWD, Touch, USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Figure 38. ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Figure 39. Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

UM1878 Rev 2 7/64

UM1878 Features

63

1 Features

• STM32L073VZT6 ultra-low-power Arm®(a) Cortex® core-based microcontroller featuring 192 Kbytes of Flash memory and 20 Kbytes of RAM in LQFP100 package

• Four 5 V power supply options: power jack, ST-LINK USB connector, user USB FS connector, or daughterboard

• Selectable MCU voltage: 3.3 V or adjustable from 1.7 V to 3.6 V

• 2.8-inch color TFT LCD with resistive touchscreen

• LCD glass 40 x 8 segments

• On-board current measurement

• IrDA transceiver

• Pressure sensor

• LC sensor metering

• Touch-sensing linear sensor

• User and reset push-buttons

• 4-direction joystick with selection button

• Board connectors:

– 2 RS-232 with DB9

– USB with Micro-B

– microSD™ card interface

• Board expansion connectors:

– RF-EEPROM daughterboard

– Extension connector for daughterboard or wrapping board

• On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage, virtual COM port and debug port

• Comprehensive free software libraries and examples available with the STM32Cube package

• Support of a wide choice of integrated development environments (IDEs), including IAR™, Keil® and GCC-based IDEs

a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

Product marking UM1878

8/64 UM1878 Rev 2

2 Product marking

Evaluation tools marked as “ES” or “E” are not yet qualified and are therefore not ready to be used as reference design or in production. Any consequences arising from such usage will not be at STMicroelectronics’ charge. In no event will STMicroelectronics be liable for any customer usage of these engineering sample tools as reference designs or in production.

‘E’ or ‘ES’ marking examples of location:

• on the targeted STM32 that is soldered on the board (for illustration of STM32 marking, refer to the section Package information in the STM32 datasheet at www.st.com).

• next to the evaluation tool ordering part number, that is stuck or silkscreen printed on the board

This board features a specific STM32 device version, which allows the operation of any bundled commercial stack/library available. This STM32 device shows a "U" marking option at the end of the standard part number and is not available for sales.

In order to use the same commercial stack in his application, a developer may need to purchase a part number specific to this stack/library. The price of those part numbers includes the stack/library royalties.

3 System requirements

• Windows® OS (7, 8 and 10), Linux® 64-bit or macOS®(a)

• USB Type-A to Micro-B cable

4 Development toolchains

• Keil® MDK-ARM(b)

• IAR™ EWARM(b)

• GCC-based IDEs including free SW4STM32 from AC6

a. macOS® is a trademark of Apple Inc., registered in the U.S. and other countries.

b. On Windows only

http://www.st.com

UM1878 Rev 2 9/64

UM1878 Demonstration software

63

5 Demonstration software

The demonstration software, included in the STM32Cube MCU Package corresponding to the on-board MCU, is preloaded in the STM32 Flash memory for easy demonstration of the device peripherals in standalone mode. The latest versions of the demonstration source code and associated documentation can be downloaded from www.st.com.

6 Ordering information

To order the STM32L073Z-EVAL Evaluation board, refer to Table 1.

Table 1. Ordering information

Order code Target STM32

STM32L073Z-EVAL STM32L073VZT6

Hardware layout and configuration UM1878

10/64 UM1878 Rev 2

7 Hardware layout and configuration

STM32L073Z-EVAL evaluation board is designed around the STM32L073VZT6 (LQFP 100 package). The hardware block Figure 2: Hardware block diagram illustrates the connections between the STM32L073VZT6 and peripherals while Figure 3: STM32L073Z-EVAL evaluation board (top view) helps the user to locate these features on the actual evaluation board.

Figure 2. Hardware block diagram

UM1878 Rev 2 11/64

UM1878 Hardware layout and configuration

63

Figure 3. STM32L073Z-EVAL evaluation board (top view)

7.1 Embedded ST-LINK/V2-1

The ST-LINK/V2-1 programming and debugging tool is integrated on the STM32L073Z-EVAL evaluation board. Compared to ST-LINK/V2 the changes are listed below.


12/64 UM1878 Rev 2

The new features supported on ST-LINK/V2-1 are:

• USB software re-enumeration

• Virtual com port interface on USB

• Mass storage interface on USB

• USB power management request for more than 100 mA power on USB

This feature is no more supported on ST-LINK/V2-1:

• SWIM interface

For all general information concerning debugging and programming features common between V2 and V2-1 refer to ST-LINK/V2 User Manual UM1075.

Known limitation:

Activating the readout protection on ST-LINK/V2-1 target, prevents the target application from running afterwards. The target readout protection must be kept disabled on ST-LINK/V2-1 boards.

Note: It is possible to power the board via CN17 (Embedded ST-LINK/V2-1 USB connector) even if an external tool is connected to connectors CN11 or CN12.

7.1.1 Drivers

The ST-LINK/V2-1 requires a dedicated USB driver, which can be found on www.st.com for Windows® XP, 7, 8.

In case the STM32L073Z-EVAL evaluation board is connected to the PC before the driver is installed, some STM32L073Z-EVAL interfaces may be declared as “Unknown” in the PC device manager. In this case the user must install the driver files, and update the driver of the connected device from the device manager.

Note: Prefer using the “USB Composite Device” handle for a full recovery.

Figure 4. USB Composite device

7.1.2 ST-LINK/V2-1 firmware upgrade

The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the USB port. As the firmware may evolve during the life time of the ST-LINK/V2-1 product (for example new functionality, bug fixes, support for new microcontroller families), it is

UM1878 Rev 2 13/64


63

recommended to visit www.st.com before starting to use the STM32L073Z-EVAL evaluation board and periodically, in order to stay up-to-date with the latest firmware version.

7.2 SWD connectors

Only Serial Wire Debug interface can be used on trace connectors CN11 and CN12. SWDIO, SWCLK and RESET of the microcontroller STM32L073VZT6 are available. The parallel trace and JTAG are not available on the STM32L073VZT6 microcontroller.

7.3 Power supply

STM32L073Z-EVAL evaluation board is designed to be powered by a 5 V DC power supply and to be protected from wrong power plug-in event by PolyZen. It is possible to configure the evaluation board to use any of the following four power supply sources:

• a 5 V DC power adapter connected on the board to the power jack CN18, called PSU_E5V on silkscreen. It is selected by a jumper placed in E5V location of JP11. The external power supply does not come with the board but can be ordered separately.

• a 5 V DC power with 300 mA limitation from the USB type B connector of ST-LINK/V2-1 CN17 (silkscreen marking (ST-LINK/V2)).Note that only the ST-LINK part is power supplied before the USB enumeration, as the host PC only provides 100 mA to the board at that time. During the USB enumeration, the STM32L073Z-EVAL evaluation board requires 300 mA of current to the host PC. If the host is able to provide the required power, the enumeration ends by a “SetConfiguration” command and then, the power switch ST890 U29 is switched ON, the red LED LD5 is turned ON, thus the evaluation board can consume a maximum of 300 mA current, not more. If the host is not able to provide the required current, the enumeration fails, therefore the power switch U29 remains OFF and the STM32 including its peripherals will not be powered. As a consequence the red LED LD5 remains turned OFF. In such case it is mandatory to use one external power supply connected to power jack CN18. This power switch features also a current limitation to protect the PC in case of short-circuit on board. If overcurrent (more than 600 mA) happens on board, the LED LD10 is lighted on.

• 5 V DC power with 500 mA limitation from the USB FS connector CN9. This connector is a micro B receptacle with a silkscreen marking on the PCB: USB. This 5 V input is called U5V.

• 5 V DC power from a customer daughterboard plugged in pin 24 of extension connector CN4. This 5 V input is called D5V.

Note: The 5 V DC power adapter should have the positive polarity at center pin, as shown in Figure 5: Pin-out of 5 V DC adapter.


14/64 UM1878 Rev 2

Figure 5. Pin-out of 5 V DC adapter

The power supply selection is done by the jumpers JP11, JP12, JP7, JP4, JP5 and JP13 as described in Table 2: Power related jumpers.

Table 2. Power related jumpers

Jumper Description

JP11

JP11 is used to select one of the four possible power supply sources.

To supply STM32L073Z-EVAL only from a 5 V power adapter connected to CN18 (PSU_E5V), set the jumper to E5V location, as following (Default setting):

To supply STM32L073Z-EVAL only from the USB connector CN9 set the jumper to U5V location, as following:

To supply STM32L073Z-EVAL only from the USB connector CN17 of ST-LINK/V2, set the jumper JP11 to STlk location, as showed in the below figure. In this case, the jumper of ST-LINK JP13 should be opened.

UM1878 Rev 2 15/64


63

JP11

To supply both STM32L073Z-EVAL and a daughterboard connected to extension connectors CN4 and CN5, (daughterboard should have its own power supply not connected), set jumpers to E5V and D5V locations, as following:

JP12

VDD_MCU (pins VDD of STM32L073Z) is connected to fixed +3.3 V DC power when JP12 is set as shown (Default setting):

VDD_MCU is connected to the adjustable DC power from 1.65 V to 3.6 V when JP12 is set as shown:

JP7

VDD_MCU power pin of STM32L073Z is connected to VDD_MCU when JP7 is set as shown (Default setting):

VDD_MCU power pin of STM32L073Z is powered by the USB connector CN9 when JP7 is set as shown here:

Table 2. Power related jumpers (continued)

Jumper Description


16/64 UM1878 Rev 2

The red LED LD5 is on when the board STM32L073Z-EVAL is powered correctly by the 5 V.

7.3.1 Adjustable power supply

As detailed above the STM32L073VZT6 microcontroller can be supplied by a variable voltage when pins 2 and 3 of JP12 are connected by a jumper. Use the potentiometer RV1

JP7

VDD_MCU power pin of STM32L073Z can be powered externally by an external power supply, providing no jumper is connected to JP7. The external supply can be connected to pin2 of JP7, as shown here:

JP4

VDDA power pin of STM32L073Z is connected to VDD_MCU when JP4 is closed as shown (default setting):

To measure the current drawn by VDDA pin of STM32L073Z, remove the jumper of JP4 and connect an ampere-meter to JP4, positive terminal to pin 1, negative to pin 2.

JP5

VREF+ pin of STM32L073Z is connected to VDD_MCU when JP5 is closed as shown (default setting):

To measure the current drawn by VREF+ pin of STM32L073Z, remove the jumper of JP5 and connect an ampere-meter to JP5, positive terminal to pin 1, negative to pin 2.

JP13

By default JP13 is not connected to let ST-LINK detect automatically if it should provide the supply of the board from ST-LINK USB VBUS (default setting).

If JP13 is connected, ST-LINK will never supply the evaluation board from ST-LINK USB.

Table 2. Power related jumpers (continued)

Jumper Description

UM1878 Rev 2 17/64


63

to adjust the voltage from 1.65 V to 3.6 V. The three LEDs LD7, LD8, LD9 warn the user that voltage is below 1.7 V or above 1.8 V.

7.4 Clock source

Two clock sources are available for the microcontroller STM32L073VZT6 on the evaluation board STM32L073Z-EVAL:

• The 32.768 KHz crystal X2 for embedded RTC

• The 8 MHz crystal X1 8 MHz with a socket. It can be removed when the internal RC clock is used.

7.5 Reset sources

The RESET signal of STM32L073Z-EVAL evaluation board is active low.

Table 3. 32.768 KHz crystal X2 solder bridges

Solder bridge Description

SB27

Open (default setting) PC14 is connected to the crystal X2.

closedPC14 is connected to pin11 of extension connector CN5. In such case R49 must be removed to avoid disturbance due to the 32Khz quartz X2.

SB26

Open (default setting) PC15 is connected to 32 KHz crystal.

closedPC15 is connected to pin 12 of extension connector CN5. In such case R48 must be removed to avoid disturbance due to the 32Khz quartz X2.

Table 4. 8 MHz crystal X1 solder bridges


SB25

Open (default setting) PH0 is connected to 8 MHz crystal X1.

closedPH0 is connected to pin 8 of extension connector CN5. In such case X1 and C27 must be removed to avoid disturbance due to the crystal.

SB23

Open (default setting) PH1 is connected to 8 MHz crystal X1.

closedPH1 is connected to pin 7 of extension connector CN5. In such case R342 must be removed to avoid disturbance due to the crystal.


18/64 UM1878 Rev 2

Sources of reset are:

• Reset button B1

• Debugging tools from SWD connectors CN12 and CN11.

• From a daughterboard connected to extension connectors, RESET is pin 24 of connector CN5.

• Embedded ST-LINK/V2-1

• RS-232 connector CN6 for ISP. Jumper JP6 should be closed for RESET to be handled by pin 8 of RS-232 connector CN6 (CTS signal).

7.6 Boot option

After reset, the STM32L073VZT6 MCU can boot from the following embedded memory locations:

• User Flash memory

• System Flash memory

• Embedded RAM (for debugging)

The microcontroller is configured to one of the listed boot options by setting the STM32L073VZT6 port BOOT0 level by the switch SW1 and by setting nBOOT1 bit of FLASH_OPTR option bytes register, as shown in Table 5. Depending on JP3, BOOT0 level can be forced to high and, SW1 action overruled, by DSR line of RS-232 connector CN6, as shown in Table 6: Boot related jumper. This can be used to force the execution of the bootloader and start user Flash memory flashing process (ISP) from RS-232 interface. The option bytes of STM32L073VZT6 and their modification procedure are described in the reference manual RM0367. STM32 microcontroller system memory boot mode Application Note (AN2606) details the bootloader mechanism and configurations.

Table 5. Boot related switch

Switch Description

SW1(default setting)

STM32L073Z-EVAL evaluation board boots from User Flash. BOOT0 pin is tied to “Low”.

STM32L073VZT6 boots from system Flash memory (nBOOT1 bit of FLASH_OPTR register is set high) or from RAM (nBOOT1 is set low). BOOT0 pin is tied to "high".

UM1878 Rev 2 19/64


63

7.7 USB FS

STM32L073Z-EVAL evaluation board supports USB2.0 FS communication. The USB connector is the micro-B type connector CN9.

The USB functionality is independent of LCD glass connectors.

STM32L073VZT6 ports PA11 and PA12 are used for the USB DM and DP signals respectively. In case PA11 and PA12 are not used for USB, it can be accessed for another usage by the extension connector CN4, providing resistors R69 and R70 are removed.

USB section of the micro-controller STM32L073VZT6 VDD_USB must be supplied with 3.0 to 3.6 V internally or externally through jumper JP7. Refer to Section 7.3: Power supply for more details regarding JP7 use.

7.7.1 Operating voltage

• If VDD_USB is supplied from VDD: USB is working typically with VDD > 3.0 V. JP7 pins 1 and 2 should be connected, please refer to Section 7.3: Power supply for more details.

• If VDD_USB is supplied from USB (U5V voltage), STM32L073Z-EVAL is functional in all the voltage range: 1.65 V to 3.6 V.

7.8 SMBus temperature sensor

A temperature sensor STLM75M2F is connected to I2C1 bus and to the SMBus of the microcontroller STM32L073VZT6.

The I2C address of temperature sensor is by default 0x92 with address pin A0 set to 1 by the closed solder bridge SB4.

By opening SB4 it is possible to change the temperature sensor address into 0x90.

Table 6. Boot related jumper

Jumper Description

JP3

jumper not fitted (default setting)

By default, BOOT0 is only controlled by switch SW1.

Jumper fitted

BOOT0 can be forced high with terminal 6 of CN6 connector (RS-232 DSR line). This configuration is used to allow the device connected via RS-232 to initiate STM32L073VZT6 flashing process.


20/64 UM1878 Rev 2

To enable SMBus functionality, the LCD glass module has to be mounted on “IO” position.

However, if the LCD glass is used and then mounted on “LCD” position, it is still possible to use the temperature sensor through the I2C bus without SMBus because PB5 previously used for SMBus is used for LCD glass.

Refer to Section 7.19: LCD glass display module for more details.

7.8.1 Limitations

The temperature sensor INT signal of SMBus is exclusive with LCD glass.


The operating voltage of temperature sensor STLM75M2F is 2.7 to 3.6 V.

7.9 RS-232 USART2 and IrDA

7.9.1 RS-232

The evaluation board STM32L073Z-EVAL offers an RS-232 communication port at the DB9 male connector CN6. The signals RX, TX, RTS and CTS from USART2 of STM32L073VZT6 are available.

Signals Bootloader_RESET and Bootloader_BOOT0 can be added on RS-232 connector CN6 for ISP support. To use Bootloader_RESET, resistor R63 must be removed and jumper JP6 must be closed. If Bootloader_BOOT0 is used, the jumper JP3 must be closed.

For jumpers settings refer to the Table 8: RS-232 and IrDA jumper settings.

7.9.2 IrDA

The evaluation board STM32L073Z-EVAL is offering an IrDA communication thanks to the IrDA transceiver U14 located in the middle of left side of the board. Jumpers settings are described inside the below table.

Table 7. Temperature sensor related solder bridge


SB4

Closed

(default setting)Temperature sensor I2C address set to 0x92.

Open Temperature sensor I2C address set to 0x90.

UM1878 Rev 2 21/64


63

7.9.3 Limitations

RS-232 from USART2 and IrDA are exclusive.


RS-232 from USART2 and IrDA are operating on the whole VDD voltage range: 1.65 V to 3.6 V.

7.10 RS-232 LPUART

LPUART signals RX, TX, RTS, CTS are available at DB9 connector CN7 located on the right side of the board. The LPUART can be used on the whole voltage range of VDD because level shifters are used.

7.10.1 Limitations

LPUART is exclusive with LCD glass. LCD glass module should be mounted in I/O position.


LPUART is operating over the whole VDD range (1.65 V to 3.6 V).

7.11 Virtual Com Port

RX and TX of USART4 are available in a USB Virtual Com Port managed by the ST-LINK/V2-1. The USB connector of ST-LINK/V2-1 is CN17. Virtual Com Port can be used over the whole operating voltage range of the microcontroller because level shifters are used.

Table 8. RS-232 and IrDA jumper settings

Jumpers and resistors Description

JP9

2 and 3 connected

(default setting)

RS-232 use:

DB9 connector CN9 RXD signal is connected to PD6 of STM32L073VZT6 used as USART2 RX.

1 and 2 connected

IrDA use:

RxD pin of IrDA transceiver U14 is connected to PD6 of STM32L073VZT6 used as IrDA Rx.


22/64 UM1878 Rev 2

By default, the serial communication settings are: 115200b/s, 8bits, no parity, 1 stop bit, no flow control.

7.11.1 Limitations

No limitation.


The Virtual Com Port is operating over the whole VDD range: 1.65 V to 3.6 V.

7.12 MicroSD card

A 4-Gbyte microSD card can be plugged into the connector CN13, located at the left side of the board. It communicates with the microcontroller STM32L073VZT6 using the SPI1 port. The card detection switch is connected to the GPIO expander MFX, part U25.

Level shifters insure functionality of microSD card over the whole voltage range.

7.12.1 Limitations

With VDD > 2.7 V the SPI clock can be at maximum speed: 16 MHz.

If VDD < 2.7 V the SPI clock should be 8 MHz maximum.


STM32L073Z-EVAL evaluation board Micro SD card is operating over whole range of VDD: 1.65 V to 3.6 V.

7.13 Analog input ADC

The analog input ADC_IN5 (port PA5) of the microcontroller STM32L073VZT6 is available at connector CN2. It is located below right to the touch sensing slider LS1. The 2-pin connector CN2 allows connection of a GND reference to the left pin of CN2, and the voltage to be converted is connected to the right pin of CN2.

Table 9. MicroSD connector CN13

Pin number

DescriptionPin

numberDescription

1 NC 6 GND

2 MicroSD_CS (PD0) 7 SPI_MISO (PE14)

3 SPI_MOSI (PE15) 8 NC

4 +3V3 9 GND

5 SPI_CLK (PE13) 10MicroSDcard_detect (to expander MFX)

UM1878 Rev 2 23/64


63

Figure 6. Location of ADC input connector CN2

A low pass filter can be implemented for the ADC input by replacing R7 and C2 by appropriate values depending on the application.

Figure 7. Provision for filter implementation

As the port PA5 can be used also a DAC output, the STM32L073Z-EVAL evaluation board gives also provision to build an output filter structure by replacing R8 and C2 by appropriate values.

Note that VREF+ pin must be connected to a reference voltage to allow a proper conversion by the ADC. In general case, VREF is connected to VDD_MCU, then jumper JP5 should be closed.


24/64 UM1878 Rev 2


ADC input is operational with VDD >1.8 V.

7.14 Analog output DAC

The analog output DAC_OUT1 (port PA4) of microcontroller STM32L073VZT6 is available at connector CN3 located below the touch sensing slider as shown below. The left pin of CN3 is the connection of GND reference, and right pin is DAC output voltage. As PA4 is also used by LC sensor metering, pins 1 and 2 of the selection jumper JP2 should be closed.

Figure 8. Location of DAC output CN3 and JP2

UM1878 Rev 2 25/64


63

A low pass filter can be implemented for the DAC output by replacing R29 and C15 by appropriate values depending on the application.

Figure 9. Provision for filter implementation

As the port PA4 can be used also as ADC input IN4, the STM32L073Z-EVAL evaluation board gives also provision to build an input filter structure by replacing R28 and C15 by appropriate values.

Please note that VREF+ pin must be connected to a reference voltage to allow a proper conversion by the ADC and the DAC. In general case, VREF+ is connected to VDD_MCU, then jumper JP5 should be closed.

7.14.1 Limitations

DAC Output is exclusive with LC sensor metering.


DAC output is operational with VDD >1.8 V.

Table 10. Analog input related jumper JP2 settings

Jumpers and resistors Description

JP2

2 and 3 connected

(default setting)

LC sensor metering use:

PA4 is connected to the capacitor C59 to filter the DAC_OUT1 voltage for LC sensor metering. DAC_OUT1 is connected internally to the inverting input of the internal comparator Comp2 (refer to Section 7.20.1: LC sensor metering principle for more details).

1 and 2 connected

DAC output DAC_OUT1 use:

PA4 is connected to CN3 connector to be used as a DAC Output.


26/64 UM1878 Rev 2

7.15 TFT LCD display

The 2.4” color TFT LCD is connected to SPI1 port of STM32L073VZT6. The LCD TFT module is the MB895/S.

Voltage translators are implemented on SPI bus between the microcontroller STM32L073VZT6 and LCD module to allow the LCD to be functional over the whole voltage range of the microcontroller. A bidirectional voltage translator is used on SPI_MOSI PE15 because the LCD module has a specific mode in which it may send back information on this line. The direction of this voltage translator is controlled by SPI_MOSI_DIR PH9. PE15 is working as MOSI when PH9 is high or as MISO when PH9 is LOW.

7.15.1 Limitations

No exclusivity.


The whole operating range of STM32L073VZT6 is: 1.65 V to 3.6 V.

7.16 User LEDs

Four general purpose color LEDs (LD 1, 2, 3, 4) are available as display devices.

Table 11. TFT LCD connector

2.4” TFT LCD connector CN16

Pin Description Pin connection Pin Description Pin connection

1 CS PE10 9 VDD 3.3V

2 SCL PE13 10 VCI 3.3V

3 SDI PE15 11 GND GND

4 RS - 12 GND GND

5 WR - 13 BL_VDD 5V

6 RD - 14 BL_Control 5V

7 SDO PE14 15 BL_GND GND

8 RESET RESET# 16 BL_GND GND

Table 12. User LEDs

User LEDs Pin used comment

LED LD1 (Green) PE4 “low” = LED lighted

LED LD2 (Orange) PE5 “low” = LED lighted

LED LD3 (Red) PD1 “low” = LED lighted

LED LD4 (Blue) PE7 “low” = LED lighted

UM1878 Rev 2 27/64


63

7.17 Input devices

The 4-direction joystick B3 with selection, Wake-up/ Tamper button B2, Reset button B1 are available as input devices.

7.18 RF-EEPROM

An RF-EEPROM daughterboard MB1020 A02 can be plugged into connector CN1 of the STM32L073Z-EVAL evaluation board. The connector CN1 is located at the top left corner of the board. The RF-EEPROM can be accessed by the microcontroller via the I2C1 bus.

The I2C address of the RF-EEPROM module MB1020 A02 is 0xA6.

CN1 can be used also as an I2C extension connector offering SDA and SCL from I2C1 bus, GND at pins 1, 3, 7 respectively.

7.19 LCD glass display module

A LCD glass module daughterboard (MB979) is mounted in the connectors CN10 and CN14 of the STM32L073Z-EVAL evaluation board. It can be connected to the LCD driver pins of the STM32L073VZT6 or work as a set of jumpers to route the microcontroller pins for another usage, depending on the position:

• When LCD glass module is mounted in LCD position, the LCD glass display is connected to the LCD driver pins of the STM32L073VZT6 and all peripherals shared with LCD glass are disconnected. See Figure 10: LCD glass board in LCD position

• When LCD glass module is mounted in IO position, all peripherals shared with the LCD glass are connected to the STM32L073VZT6 and the LCD glass is disconnected. See Figure 11: LCD glass board in IO position.

• When LCD glass module is not plugged in, the connectors CN10 and CN14 give access to ports of the microcontroller. Refer to Figure 3: STM32L073Z-EVAL evaluation board (top view) for more details.

Table 13. Input devices

Input devices Pin used Circuit

Joystick SEL GPIO0 MFX U25

Joystick DOWN GPIO1 MFX U25

Joystick LEFT GPIO2 MFX U25

Joystick RIGHT GPIO3 MFX U25

Joystick UP GPIO4 MFX U25

Wake-up/ Tamper button B2 PC13 STM32L073VZT6 U5

RESET B1 NRST STM32L073VZT6 U5


28/64 UM1878 Rev 2

Figure 10. LCD glass board in LCD position

Figure 11. LCD glass board in IO position

The custom LCD glass module used on MB979 daughterboard is XHO5002B. The signal mapping of each LCD segment is detailed in following table (rows are LCD_COMx, columns LCD_SEGy, with x comprised between 0 and 7, y from 0 to 39):

Table 14. LCD glass segments 21 to 28 mapping table

SEG 21 22 23 24 25 26 27 28

COM7 1g 2g 3g 4g 5g 6g 7g 8g

COM6 1h 2h 3h 4h 5h 6h 7h 8h

COM5 1i 2i 3i 4i 5i 6i 7i 8i

COM4 1j 2j 3j 4j 5j 6j 7j 8j

COM3 1d 2d 3d 4d 5d 6d 7d 8d

COM2 1c 2c 3c 4c 5c 6c 7c 8c

COM0 1e 2e 3e 4e 5e 6e 7e 8e

COM1 1f 2f 3f 4f 5f 6f 7f 8f

UM1878 Rev 2 29/64


63

Table 15. LCD glass segments 0 and 29 to 39 mapping table

SEG 29 30 31 32 33 34 35 36 37 38 39 0

COM7 9g 10g 11g 12g 13g 14g 15g 16g 17g 18g 19g 5J

COM6 9h 10h 11h 12h 13h 14h 15h 16h 17h 18h 19h 5C

COM5 9i 10i 11i 12i 13i 14i 15i 16i 17i 18i 19i 5B

COM4 9j 10j 11j 12j 13j 14j 15j 16j 17j 18j 19j 5I

COM3 9d 10d 11d 12d 13d 14d 15d 16d 17d 18d 19d 13a

COM2 9c 10c 11c 12c 13c 14c 15c 16c 17c 18c 19c 13b

COM0 9e 10e 11e 12e 13e 14e 15e 16e 17e 18e 19e O1

COM1 9f 10f 11f 12f 13f 14f 15f 16f 17f 18f 19f O2

Table 16. LCD glass segments 1 to 8, 15, 18 to 20 mapping table

SEG 6 7 8 3 4 5 1 2 18 19 20 15

COM7 7J 7N 7E 6J 6N 6E 5N 5E 4J 4N 4E 3J

COM6 7C 7M P6 6C 6M P5 5M P4 4C 4M P3 3C

COM5 7B 7H 7F 6B 6H 6F 5H 5F 4B 4H 4F 3B

COM4 7I 7A 7G 6I 6A 6G 5A 5G 4I 4A 4G 3I

COM3 19a 18a 17a 16a 15a 14a 12a 11a 10a 9a 8a 7a

COM2 19b 18b 17b 16b 15b 14b 12b 11b 10b 9b 8b 7b

COM0 S 7D Q6 O4 6D Q5 5D Q4 µA 4D Q3 C4

COM1 nA 7K 7L O3 6K 6L 5K 5L mA 4K 4L C3

Table 17. LCD glass segments 9 to 14, 16, 17 mapping table

SEG 16 17 12 13 14 9 10 11

COM7 3N 3E 2J 2N 2E 1J 1N 1E

COM6 3M P2 2C 2M P1 1C 1M +

COM5 3H 3F 2B 2H 2F 1B 1H 1F

COM4 3A 3G 2I 2A 2G 1I 1A 1G

COM3 6a 5a 4a 3a 2a 1a S3 S1

COM2 6b 5b 4b 3b 2b 1b S4 S2

COM0 3D Q2 C1 2D Q1 S5 1D -

COM1 3K 3L C2 2K 2L S6 1K 1L


30/64 UM1878 Rev 2

Figure 12. LCD segment names

Table 18. LCD glass related jumpers and solder bridges

Jumpers, solder bridges, resistors

Description

JP8, SB29,SB30

JP8 closed

SB29, SB30 closed

(default setting)

The LC network (L2 or L3, and C40) on STM32L073Z-EVAL is used for LC sensor metering. Nothing is connected to connector CN8.

JP8 closed

SB29, SB30 opened

An external LC network on STM32L073Z-EVAL can be connected to connector CN8 for LC sensor metering.

SB31,R67, SB32, SB33

SB31 closed, R67 soldered, SB32 opened, SB33 opened (default setting)

The operational amplifier U9 TSV611ILT is used to generate the VDD/2 voltage.

SB31 opened, R67 removed, SB32 closed, SB33 closed


UM1878 Rev 2 31/64


63

7.19.1 Limitations

LCD glass is exclusive with LPUART, LC sensor metering, temperature sensor INT, EXT RESET.

7.20 LC sensor metering

The LC sensor metering is a metal detector based on a resonating LC network connected to the microcontroller STM32L073VZT6. The STM32L073VZT6 trigs periodically the LC network to initiate self-oscillations. If a non-ferrous metal plate is placed in the magnetic field of the inductor L, the higher loss reduces the number of self-oscillations. Using the comparator and the low-power timer LPTIM embedded inside the microcontroller, it is possible for the software to detect the presence of non-ferrous metal by a lower count of the timer LPTIM.

A small board called Detection Accessory MB1199 is proposed with the evaluation board STM32L073Z-EVAL, to test the LC sensor metering quickly. The copper area to detect is 12 mm by 12 mm wide.

JP1, JP2, JP14, JP15, JP16, JP17, JP18

JP1, JP15, JP17, JP2: 2,3 closed

JP14, JP16, JP18: opened

LC sensor metering is used, exclusive with LCD glass and DAC output.

JP1, JP15, JP17 with pins 2 and 3 closed: ports PA7, PB4, PC0 are used for LC sensor metering signals: DET_COMP2_OUT, DET_COMP2_INP, DET_LPTIM_CH1 respectively.

JP2 with pins 2 and 3 closed: port PA4 is used for LC sensor metering signal DET_DAC_OUT1

JP14, JP16, JP18 opened: reserved use.



LCD glass is used, DAC output on CN3 is used, both are exclusive with LCD glass

JP1, JP15, JP17 with pins 1 and 2 closed: ports PA7, PB4, PC0 are used for LCD glass: LCDSEG4, LCDSEG8 and LCDSEG18 respectively.

JP2 with pins 1 and 2 closed: port PA4 is used for DAC output connector CN3, signal DAC_OUT1.


Table 18. LCD glass related jumpers and solder bridges (continued)


Description


32/64 UM1878 Rev 2

7.20.1 LC sensor metering principle

Figure 13. Functional block diagram of LC sensor metering

The port PD7 of the microcontroller STM32L073VZT6 is configured in GPIO output to deliver a high state. PD7 is in fact the signal called POWER_CONTROL. It is in charge to provide power supply to the resistor divider Ra, Rb and the follower amplifier based on an operational amplifier. The DC voltage at the output the operational amplifier is approximately VDD/2 as Ra = Rb.

In a second phase, the port PB4 is used in GPIO output to cause a DC current flowing inside the inductor of the LC sensor.

In steady state, the DC current is VDD/2 Re. The inductor stores the electrical energy in his magnetic core.

PB4 is internally disconnected from the GPIO and connected to the positive input of the comparator Comp2 of the microcontroller STM32L073VZT6. The current disruption causes high frequency voltage self-oscillations of the LC resonator circuit. The lower connection of the LC resonator is considered grounded from an AC point of view thanks to the capacitor and the low output impedance of the follower amplifier. Then, the voltage oscillations are

UM1878 Rev 2 33/64


63

available at port PB4 with a superimposition of a DC voltage of VDD/2 respectively to the ground. After the comparator threshold controlled by the DAC_OUT1 voltage is set properly by a calibration, the comparator will deliver pulses to the Low Power timer LPTIM. LPTIM is in charge to count the number of oscillations.

The value in the counter LPTIM depends directly on the decay time of the oscillations, and therefore to the quality factor of the inductor L.

Finally if a piece of non-ferrous metal is placed in the magnetic field of the inductor, losses increase, reducing the decay time and then it reduces the number of counts in LPTIM. The software can thus detect the presence of a piece of non-ferrous metal by comparing the value of LPTIM timer that is lower with metal presence than without.

7.20.2 LC sensor metering description

The LC sensor metering of STM32L073Z-EVAL evaluation board follows closely the principle described above (see Figure 14).

Figure 14. LC sensor metering schematic

The LC network used for LC sensor metering is based on the inductor L2 or L3 and the capacitor C40. A double footprint allows to solder inductor L2 or L3 exclusively, the location is called detection on the PCB. The inductor L2 or L3 is called L for sake of simplicity in this description. The POWER_CONTROL PD7 supplies the voltage divider R73, R76 and the low-power operational amplifier TSV631ILT U9 to generate a VDD/2 voltage at the LC_L net of the LC network (refer to Figure 14: LC sensor metering schematic). From AC voltage point of view, LC_L net is grounded, thanks to the capacitor C46 and the low-output impedance of the operational amplifier.

Another operational amplifier TSV911ILT U11 is available in back-up of U9 with improved output impedance performances over frequency but with a higher operating current.

To store magnetic energy inside the inductor L, the ports PB7 and PB4 should be set in GPIO output mode, with PD7 high, PB4 low. The DC current flowing inside L is VDD/2*R59.

After the energy is stored in the inductor L, the port PB4 called DET_COMP2_INP is switched from GPIO output into a positive input of the comparator Comp2. This current disruption inside the inductor L, trigs the self-oscillations of the LC network. The oscillation frequency is typically in the range of 500 KHz to 700 KHz.

C401nF

DET_COMP2_INP

12

External LC network

CN8

DET_COMP2_OUT

-Comp2

STM32L

PB4PA7

+

R67

0C57

[N/A]

R59

120

VDD/2 generation

AC ground

LC sensor

Internal comparator 2

CompOutTP18

VDD/2TP14

JP8

C46

100pF

C631nF R73

330K

R76330K

POWER_CONTROL

3

1

2

4

5

Vcc-

Vcc+

U9TSV631ILT

4

3

2

1

5

Vcc-

Vcc+

U11TSV911ILT

SB29

Closed by default

SB30

Closed by default

LC_H

LC_L

L3[N/A)

LC_H

LC_L

L 1

NC 2

NC 3

L 4

NC8

NC7

NC6

NC5

L

NC

NC

L

NC

NC

NC

NC

L2

100uH

Parts placed close to STM32L073

SB33

Open by default

SB32

Open by default

DET_DAC_OUT1C591nF

Comp2 INM input can be connected to DAC OUT1 using an internal switch of the MCU

C47[N/A]R64

330K

R54330K

PA4

PD7

SB31

Closed by default

close to MCU

TP18 located close to MCU pin PA7

DET_LPTIM_CH1 LPTIM inputPC0

C58100nF

Note *: Sensor inductors L2 or L3 are exclusive.Using a double PCB footprint.

see note *

see note *


34/64 UM1878 Rev 2

The threshold of the comparator is the voltage on the negative input of Comp2. It is generated by the DAC_OUT1 connected internally inside the microcontroller. The DAC_OUT1 voltage should be set to a voltage a bit higher to VDD/2, typically a few 10 mV over VDD/2. The port PA4 called DET_DAC_OUT1 connected to internal voltage DAC_OUT1 allows the connection to the external capacitor C59 for a more stable threshold voltage.

The port PA7 DET_COMP2_OUT delivers calibrated pulses to the low-power timer input DET_LPTIM_CH1, port PC0.

An external LC network can be used by removing the solder bridges SB29, SB30 and by connecting an external parallel LC network to the connector CN8.

Some solder bridges and jumpers should be set properly to enable the LC sensor metering, refer to Table 19: Solder bridges and jumpers for LC sensor metering:

Table 19. Solder bridges and jumpers for LC sensor metering


Description

JP8, SB29, SB30

JP8 closed

SB29, SB30 closed

(default setting)

The LC network (L2 or L3, and C40) on STM32L073Z-EVAL is used for LC sensor metering. Nothing is connected to connector CN8.

JP8 closed

SB29, SB30 opened

An external LC network on STM32L073Z-EVAL can be connected to connector CN8 for LC sensor metering.

SB31, R67, SB32, SB33

SB31 closed, R67 soldered, SB32 opened, SB33 opened

(default setting)


SB31 opened, R67 removed, SB32 closed, SB33 closed


UM1878 Rev 2 35/64


63

7.20.3 Limitations

LC sensor metering is exclusive with LCD glass and DAC output.

But it is possible to use LCD glass without segments SEG4, SEG8, SEG18 with LC sensor metering with JP1, JP15, JP17, JP2: 1,2 closed.

However, if LCD segments SEG4, SEG8, SEG18 are not used, the LCD glass can be used in such limited manner with LC sensor metering. In that case jumpers JP1, JP15, JP17 and JP2 should have pins 1 and 2 closed.

7.21 Pressure sensor

An absolute pressure sensor with 0 to 1000 HPa measurement range is used.

7.21.1 Calculations

The equivalent schematic of the sensor is a Wheastone bridge with a following differential voltage output considering it is supplied with +3.3 V:

JP1, JP2, JP14, JP15, JP16, JP17, JP18



(default setting)

LC sensor metering is used, and is exclusive with LCD glass and DAC output.

JP1, JP15, JP17 with pins 2 and 3 closed: ports PA7, PB4, PC0 are used for LC sensor metering signals: DET_COMP2_OUT, DET_COMP2_INP, DET_LPTIM_CH1 respectively.

JP2 with pins 2 and 3 closed: port PA4 is used for LC sensor metering signal DET_DAC_OUT1




LCD glass (without LCDSEG4, LCDSEG8, LCDSEG18) is used, DAC output on CN3 is used, both are exclusive with LCD glass.

JP1, JP15, JP17 with pins 1 and 2 closed: ports PA7, PB4, PC0 are used for LCD glass: LCDSEG4, LCDSEG8, LCDSEG18 respectively.

JP2 with pins 1 and 2 closed: port PA4 is used for DAC output connector CN3, signal DAC_OUT1.


Table 19. Solder bridges and jumpers for LC sensor metering (continued)


Description


36/64 UM1878 Rev 2

As the proposed pressure measurement targets only barometric use, the sensor is used only in the range from 800 HPa to 1000 HPa, then the amplification is centered on this range. Then it leads to use a differential amplifier with offset voltage (see Table 15):

Figure 15. Differential amplifier with offset correction

Following the formula, the differential output voltage (Vo+ - Vo-) versus differential input voltage (Vi+ - Vi-) is:

Vo+- Vo- = [(R1R3 + R1R2 + 2R2R3) / R1R3]* (Vi+ - Vi-) – VDD*R2/R3.

Using R1 = 220, R2 = 47Kohm, R3=27.4Kohm the output differential voltage is:

(Vo+- Vo-) = 430* (Vi+ - Vi-) - 1.71*VDD

It gives the following differential voltages referring to a virtual ground equal to VDD/2 (see Table 21: Differential voltage):

Table 20. Sensor differential voltage

Pressure Sensor differential voltage

0 HPa 0 mV

800 HPa 10.56 mV

1000 HPa 13.2mV

1200 HPa 15.84 mV

UM1878 Rev 2 37/64


63

Finally, in STM32L073Z-EVAL evaluation board, the differential voltage is shifted by a VDD/2 offset and changed in a single voltage by the last unity gain operational amplifier. The output of this amplifier, delivers the single output voltage to the ADC input PA0:

7.21.2 Errors

Offset error: with 0.1% tolerance resistors, the error is 22.6 mV, then equivalent to 0.4 HPa. Gain error: with 0.1% tolerance resistors, the gain error is roughly 0.2%, at 1000 HPa is equivalent to 2 HPa. So, errors due to electronic circuitry is around 2.4 HPa at 1000 HPa and error due to the sensor himself is 6 HPa. Finally the total absolute error is 0.4+2+6 = 8.4 HPa.

7.21.3 Pressure computation

The relation between the atmospheric pressure and the measured voltage is linear. To overcome gain and offset errors, the software of the user may use a calibration. It allows to determine the linear equation between the measured voltage and the atmospheric pressure. The slope of the linear equation is typically:

2880 1650–( ) 200⁄ 6.15mVHPa

---------------------=

7.21.4 Filtering

Low pass filtering is mandatory to reduce unwanted noise and also to avoid aliasing, because the ADC will oversample the value to simulate a 16-bit ADC.

Table 21. Differential voltage

PressureSensor differential voltage

(Vi+ - Vi-)Differential Vout (Vo+ - Vo-)

0 HPa 0 mV Saturated at -VDD

800 HPa 10.56 mV -1.3V

1000 HPa 13.2mV 0V

1200 HPa 15.84 mV +1.23V

Table 22. Single output voltage to the ADC

PressureSensor differential voltage

(Vi+ - Vi-)Single output voltage

ADC input PA0

0 HPa 0 mV 0V

800 HPa 10.56 mV 0.163V

1000 HPa 13.2mV 1.65V

1200 HPa 15.84 mV +2.88V


38/64 UM1878 Rev 2

A 1st order low pass with 3 Hz cut-off frequency, is composed of 47 K resistors combined with 1 uF capacitors to feedback the first amplifiers U3A and U3B.

7.21.5 Limitations

No exclusivity.


Operating voltage is fixed at: +3.3 V

7.22 Touch sensing slider

The STM32L073Z-EVAL evaluation board supports a touch sensing slider based on either RC charging or charge transfer technology. The charge transfer technology is enabled by the default assembly.

The touch sensing slider is connected to PB12, PB0, PA1 and the related charge capacitors are respectively connected to PB13, PB1 and PA2. PC6 and PC7 manage an active shield reducing sensitivity to other signals. The active shield is placed on the internal layer 2, immediately under the slider to eliminate influence from other circuits.

Some rework on solder bridges and resistors is necessary to use touch sensing and it is described in the below Table 23:

Table 23. Touch sensing related solder bridges

Solder bridges

Settings to enable touch

sensing

STM32 port

Description

SB6 Close PB12 Connects the 1st touch sensing zone to PB12.

SB5 Open PB12 Disconnects PB12 from track to LCD glass to avoid disturbances.

SB8 Close PB0 Connects the 2nd touch sensing zone to PB0.


SB11 Close PA1 Connects the 3rd touch sensing zone to PA1.

SB12 Open PA1 Disconnects PA1 from track to LCD glass to avoid disturbances.

SB17 Close PC6 Connects the shield to PC6.

SB18 Open PC6 Disconnects PC6 from track to LCD glass to avoid disturbances.

SB24 Close PC7 Connects the charge capacitor of shield to PC7.

SB22 Open PC7 Disconnects PC7 from track to LCD glass to avoid disturbances.

SB15 Close PB13 Connects the charge capacitor to PB13.


SB7 Close PB1 Connects the charge capacitor to PB1.


UM1878 Rev 2 39/64


63

Figure 16. Solder bridges settings to enable the touch slider (red = closed, green = opened)

7.22.1 Limitations

Touch sensing slider is exclusive with LCD glass.

7.23 Extension connectors

Two 2.54 mm pitch headers CN4 and CN5 called “extension connectors” are intended to connect an external board to the STM32L073Z-EVAL evaluation board.

Both connectors CN4 and CN5 give access to the GPIOs that are not accessible by the LCD glass connectors.

In addition to GPIOs, CN4 and CN5 have the following supplies and signals:

GND, +3V3, D5V, RESET#, VDD, Clocks pins (PC14, PC15, PH0, PH1).

For more details regarding clock pins, refer to Section 7.4: Clock source.

SB10 Close PA2 Connects the charge capacitor to PA2.

SB9 Open PA2 Disconnects PA2 from track to LCD glass to avoid disturbances.

Table 23. Touch sensing related solder bridges (continued)

Solder bridges

Settings to enable touch

sensing

STM32 port

Description


40/64 UM1878 Rev 2

7.24 IDD auto-measurement

In addition to the jumpers allowing to measure separately each power domain or the whole microcontroller consumption, the STM32L073Z-EVAL evaluation board offers also an automatic consumption measurement. The current of the microcontroller STM32L073VZT6 can be autonomously measured while it is in Run or Low power saving modes.

Table 24. Extension connectors pin-out

CN4 (left side) CN5 (right side)

Pin Signal Pin Signal

1 GND 1 GND

2 +3V3 2 GND

3 PE7 3 PA5

4 PE8 4 PB2

5 PE9 5 PA0

6 PE10 6 PA4

7 PE11 7 PH1

8 PE12 8 PH0

9 PE13 9 PH10

10 PE14 10 PH9

11 GND 11 PC14

12 GND 12 PC15

13 PE15 13 PC13

14 PA11 14 GND

15 PA13 15 GND

16 PA12 16 NC

17 PD0 17 VLCD

18 PA14 18 PE6

19 PD3 19 PE5

20 PD1 20 PE4

21 PD6 21 BOOT0

22 PD5 22 PB7

23 PD7 23 PB6

24 D5V 24 RESET#

25 GND 25 GND

26 GND 26 VDD

UM1878 Rev 2 41/64


63

7.24.1 Analog section description

The analog part of the IDD auto-measurement circuit is based on five shunts resistors: R134, R131, R130, R132 and R133, switched by PMOS transistors to get enough resolution and precision over a wide range of currents. The possibility to use shunts from 1 ohm to 10 Kohm allows to measure currents from 100 mA to few 10 mA typically. This covers all functional modes of the STM32L073VZT6 microcontroller.

Figure 17. Figure: analog section schematic

Table 25. IDD auto-measurement related jumper settings

Jumper Description

JP10

(default setting)

JP10 2 and 3 closed (jumper in IDD position):

STM32L073VZT6 is powered through IDD measurement circuit.

JP10 1 and 2 closed (jumper in VDD position):

IDD measurement circuit is bypassed, STM32L073VZT6 is powered directly.

JP10: no jumper to pins 1, 2, 3.

STM32L073VZT6 total current consumption can be measured by connecting an ampere-meter between pins 1 and 2 of JP10.

VDD

R13310K [1%]

VDD_MCU

GND

VDD

C104100nF

GND

GND

R17022K

Current direction

to MCU

differentialamplifier

R1321K [1%]

R130100 [1%]

R13110 [1%]

R1341 [1%]

C100100nF

GND

GNDGND GND GND

GND

CAL

SH0 SH1 SH2 SH3

Shunts

3

4

5

G

SD

6

21

T10

STT7P2UH7

3

4

5

G

SD

6

21

T4

STT7P2UH7

3

4

5

G

SD

6

21

T2

STT7P2UH7

3

4

5

G

SD

6

21

T6

STT7P2UH7

3

4 5

G

S D

621

T8STT7P2UH7

C102

100nF

+3V3

V+

V-

3

21

48 U21A

TSZ122IST

V+

V-

3

21

48

U23ATSZ122IST

GND

+5V

C88100nF

GND

decoupling capacitorsclose to TSZ122

5

67

U21B

TSZ122IST

IDD_MEAS

see note *

see note *

see note *

see note * see note *

SH1_D SH2_D SH3_DSH0_D

CAL_D

5

67

U23BTSZ122IST

32

1

JP10

bypass

R151100

C8710uF

R164100

C1011uF

GND

R159

1K [0.1%]

R162

1K [0.1%]

R163

49K9 [0.1%]

R165

49K9 [0.1%]

R1671K

R127100K

R124100KR126

100K

R123100K

R125100K

decoupling capacitorclose to TSZ122


42/64 UM1878 Rev 2

The voltage drop across the selected shunt is amplified by a very high accuracy and zero-drift operational amplifier TSZ122.

The voltage drop is connected to pins 3 and 5 of the operational amplifier TSZ122 U21.

The digital section switches or not to a higher resistance shunt for a better measurement, depending on the measurement result obtained with one shunt. The transistor T8 is used to set to zero the voltage difference for the calibration of the analog amplifier.

7.24.2 Difference amplifier

Figure 18. Difference amplifier

The voltage measured over the shunt is amplified by a difference amplifier based on high performances operational amplifiers TSZ122. The DC gain is 49.9. Finally the output voltage IDD_MEAS is available for conversion and treatment by the digital section.

7.24.3 Digital section description

The multifunction expander MFX U25 is, among other functions, in charge of sequencing and acquiring the IDD auto-measurement feature.

It controls the switches of the analog section to measure the current sequentially from the lowest resistance shunt to the highest one, to maximize the precision of the current measurement. It works as an auto-range ampere-meter. It has internally some functionalities to avoid a too big voltage drop on the supply voltage of the microcontroller under test.

From SW point of view, it is up to the host STM32L073VZT6 to send the commands to the MFX to measure the current via the I2C bus. A delay can be used to allow the host STM32, to request a measurement and have enough time to go in low-power mode. After the given delay the MFX will measure the current. At the end, the measured value can be read by the host STM32L073VZT6 inside the MFX registers through the I2C bus.

R13310K [1%]

GND

VDD

C104100nF

GND

GND

R17022K


R1321K [1%]

R130100 [1%]

31[1%]

C100100nF

GND

GND GND

SH2 SH3

Shunts

3

4

5

G

SD

6

21

T2

STT7P2UH7

3

4

5

G

SD

6

21

T6

STT7P2UH7

C102

100nF

+3V3

V+

V-

3

21

48 U21A

TSZ122IST

V+

V-

3

21

48

U23ATSZ122IST

GND

+5V

C88100nF

GND


5

67

U21B

TSZ122IST

IDD_MEAS

see note *see note *

D SH2_D SH3_D

5

67

U23BTSZ122IST

R151100

C8710uF

R164100

C1011uF

GND

R159

1K [0.1%]

R162

1K [0.1%]

R163

49K9 [0.1%]

R165

49K9 [0.1%]

R1671K

R127100K

R124100K


UM1878 Rev 2 43/64


63

Figure 19. Digital section schematic

Warning: To avoid current injection from STM32 to components on the board during IDD measurement it is strongly recommended to keep VDD_MCU ≤ 3.3 V. Some components on the board are powered by 3.3 V so that, if VDD_MCU is higher than 3.3 V, a current can be injected.

MFX_IRQOUT

MFX_SWCLK

CAL

SH2SH1

MFXMulti Function eXpander

MFX_SWDIO

SH3

R166 0PE6

VDD

C116100nF

C94100nF

C91100nF

C106100nF

VDD one capacitor close to each MFX pins: VDD, VDD_1, VDD_2, VDD_3

C99100nF

SH0

VDD_MCU

JOY_SELJOY_DOWNJOY_LEFTJOY_RIGHTJOY_UP

R177 0R179 0PB6

PB7

MFX_WKUP

VDD

R174510

L7

BEAD C901uF C93

100nF

VDD

R176[N/A]

R171 10K

R189 10K

R190 10K

R191 10K

R188 10K

PE6 can also be used to wake-up the MCU

MFX_I2C_SDAMFX_I2C_SCL

MFX_MicroSD_detectRESET#

R1580

XPTP27 [N/A]XNTP26 [N/A]

YPTP29 [N/A]

TP31

[N/A]

R180 0

R16910K

C95[N/A]

R155[N/A]

MFXMFXMFXMFXMFXMFX

R157100K

D8

BAT60JFILM

IDD_MEAS

MFX_V3WAKEUP2 NRST7

TSC_XP/GPO010

TSC_XN/GPO111

TSC_YP/GPO212

TSC_YN/GPO313

USART_TX21

USART_RX22

SPARE14

SWDIO34

SWCLK37

I2C_SCL42

I2C_SDA43

BOOT044

I2C_ADDR45

IRQOUT46

IDD_CAL/GPO4 3

IDD_SH0 4

IDD_SH1/GPO5 5

IDD_SH2/GPO6 6

IDD_MEAS 25

GPIO0 18

GPIO1 19

GPIO2 20

GPIO3 39

GPIO4 40

GPIO5 15

GPIO6 16

GPIO7 17

GPIO8 29

GPIO9 30

GPIO10 31

GPIO11 32

GPIO12 33

GPIO13 26

IDD_SH3/GPO7 38

GPIO14 27

GPIO15 28

IDD_VDD_MCU 41

VDD

1

VDDA

9

VDD_1

24

VDD_2

36

VDD_3

48

VSS

A8

VSS

_123

VSS

_235

VSS

_347

U25STM32L152CCT6

Connectors UM1878

44/64 UM1878 Rev 2

8 Connectors

8.1 RS-232 connector CN6

Figure 20. RS-232 connector CN6 (front view)

8.2 Power connector CN18

STM32L073Z-EVAL evaluation board can be powered from a DC 5 V power supply via the external power supply jack (CN18) shown in Figure 21: Power supply connector CN18. The central pin must be positive.

Figure 21. Power supply connector CN18

Table 26. RS-232 connector CN6

Pin number DescriptionPin

numberDescription

1 NC 6 Bootloader_BOOT0

2 RX (PD6) 7 RTS (PD4)

3 TX (PD5) 8 CTS/ Bootloader_RESET

4 NC 9 NC

5 GND - -

UM1878 Rev 2 45/64

UM1878 Connectors

63

8.3 LCD glass daughterboard connectors CN10 and CN14

Two 48-pins male headers CN10 and CN14 are used to connect with the LCD glass daughterboard (MB979). The space between these two connectors and the position of every LCD glass signals are defined as a standard, which allows to develop common daughterboards for several evaluations boards. The standard width between CN10 pin 1 and CN14 pin 1 is 700 mils (17.78 mm).

GPIO signals on these two connectors can be tested on odd pins when LCD glass board is not plugged in. For signals assignment details refer to Table 27: LCD glass daughterboard connectors.

Table 27. LCD glass daughterboard connectors

CN10 CN14

Odd pin GPIO signal Odd pin GPIO signal

1 PA9 1 PD2

3 PA8 3 PC12

5 PA10 5 PC11

7 PB9 7 PC10

9 PB11 9 PC3

11 PB10 11 PC4

13 PB5 13 PC5

15 PB14 15 PC6

17 PB13 17 PC7

19 PB12 19 PC8

21 PA15 21 PC9

23 PB8 23 PD8

25 PB15 25 PD9

27 PC2 27 PD10

29 PC1 29 PD11

31 PC0 31 PD12

33 PA3 33 PD13

35 PA2 35 PD14

37 PB0 37 PD15

39 PA7 39 PE0

41 PA6 41 PE1

43 PB4 43 PE2

45 PB3 45 PE3

47 PB1 47 PA1

Connectors UM1878

46/64 UM1878 Rev 2

If CN10 and CN14 are used as GPI/O extension connectors on a daughterboard, odd pins and even pins must not be connected directly on the daughterboard.

8.4 ST-LINK/V2-1 programming connector CN15

The connector CN16 is used only for embedded ST-LINK/V2-1 programming during board manufacture. It is not populated by default and not for end user.

8.5 ST-LINK/V2-1 USB Type B connector CN17

The USB connector CN17 is used to connect embedded ST-LINK/V2-1 to PC for debugging of board.

Figure 22. USB type B connector CN17

Table 28. USB type B connector CN17

Pin number Description Pin number Description

1 VBUS (power) 4 GND

2 DM 5,6 Shield

3 DP - -

UM1878 Rev 2 47/64

UM1878 Connectors

63

8.6 SWD connector CN12

Figure 23. Trace debugging connector CN12 (top view)

8.7 Trace debugging connector CN11

Figure 24. Trace debugging connector CN11 (top view)

Table 29. SWD debugging connector CN12


1 VDD power 2 VDD power

3 - 4 GND

5 - 6 GND

7 SWDIO PA13 8 GND

9 SWCLK PA14 10 GND

11 - 12 GND

13 - 14 GND

15 RESET# 16 GND

17 DBGRQ 18 GND

19 DBGACK 20 GND

Connectors UM1878

48/64 UM1878 Rev 2

8.8 MicroSD connector CN3

Figure 25. MicroSD connector CN3

Table 30. Trace debugging connector CN11

Pin number DescriptionPin

numberDescription

1 VDD power 2 SWDIO PA13

3 GND 4 SWCLK PA14

5 GND 6 -

7 Pin is removed 8 -

9 GND 10 RESET#

11 GND 12 -

13 GND 14 -

15 GND 16 -

17 GND 18 -

19 GND 20 -

Table 31. MicroSD connector CN3

Pin number

DescriptionPin

numberDescription

1 NC 6 GND

2 MicroSD_CS (PD0) 7 SPI_MISO (PE14)

3 SPI_MOSI (PE15) 8 NC

4 +3V3 9 GND

5 SPI_CLK (PE13) 10 MicroSDcard_detect (to expander MFX)

UM1878 Rev 2 49/64

UM1878 Connectors

63

8.9 RF-EEPROM daughterboard connector CN3

Figure 26. RF-EEPROM daughterboard connector CN3 (front view)

Table 32. RF-EEPROM daughterboard connector CN3


1 I2C_SDA (PG13) 5 VDD

2 NC 6 NC

3 I2C_SCL (PG14) 7 GND

4 EXT_RESET(PC6) 8 NC

Elec

trical s

ch

em

atic

sU

M1

878

50/6

4U

M1

878 R

ev 2

Appendix A Electrical schematics

Figure 27. STM32L073Z-EVAL

1 12

MB1168

MB1168 C-01

2/4/2016

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:

STM32L073Z-EVALProject:

I2C1_SDAI2C1_SCL

MFX_IRQOUT

Bootloader_BOOT0_3V3Bootloader_RESET_3V3

BOOT0

USART2_RX_3V3

USART2_CTS_3V3

USART2_TX

USART2_RTS

SPI1_SCK

SPI1_MOSI

MicroSD_CSTFT_CS

KEYLED4LED3

LED1LED2

USART4_RX_3V3USART4_TX

PRESSURE

TS_G1_IO2

TS_G1_IO3

DAC_OUT1

TS_G3_IO2

TS_G3_IO3

TS_G6_IO2

TS_G6_IO3

ADC_IN5

USB_DMUSB_DP

SWDIOSWCLK

SPI1_MISO_3V3

DET_DAC_OUT1

SPI1_MOSI_DIR

LCDSEG[0..39]LCDCOM[0..7]PA[0..15]PB[0..15]PC[0..15]PD[0..15]PE[0..15]

RES

ET#

PH1PH0

PH10PH9

MFX_WKUP

TS_G8_IO1TS_G8_IO2

DET_COMP2_INP

POWER_CONTROLDET_COMP2_OUT

DET_LPTIM_CH1

U_MCUMCU.SchDoc

PRESSURE

U_ADC16b_PressureADC16b_Pressure.SchDoc

DET_COMP2_INPDET_COMP2_OUT

DET_DAC_OUT1POWER_CONTROL

DET_LPTIM_CH1

U_DetectionDetection.SchDoc

MFX_IRQOUT


MFX_WKUP

MFX_MicroSD_detect

RESET#MFX_I2C_SDAMFX_I2C_SCL

U_IDD_measurementIDD_measurement.SchDoc

LCDSEG[0..39]LCDCOM[0..7]

LPUART_RX_3V3LPUART_TX

LPUART_CTS_3V3LPUART_RTS

TST_MOSI_DIRTempSensor_INTEXT_RESET

PA[0..15]PB[0..15]PC[0..15]PD[0..15]PE[0..15]

RES

ET#

PH1PH0

BOOT0

PH10PH9

U_LCD_Glass_Ext_connectorLCD_Glass_Ext_connector.SchDoc

I2C1_SDA

TempSensor_INTEXT_RESET

JOY_SELJOY_DOWNJOY_LEFT

JOY_RIGHTJOY_UP

DAC_OUT1ADC_IN5

KEYLED4LED3

LED1LED2

I2C1_SCL

U_PeripheralsPeripherals.SchDoc

U_PowerPower.SchDoc


SWDIOSWCLK

RESET#

U_STLINKSTLINK.SchDoc


SPI1_MISO_3V3SPI1_MOSI

SPI1_MOSI_DIRSPI1_SCK

MicroSD_CSTFT_CS

TST_MOSI_DIR

U_TFT_MicroSDTFT_MicroSD.SchDoc

USART2/IrDA_RX_3V3

Bootloader_BOOT0_3V3Bootloader_RESET_3V3

USART2_CTS_3V3

USART2_TX

USART2_RTSLPUART_RX_3V3

LPUART_CTS_3V3

LPUART_TX

LPUART_RTS

U_USART_LPUARTUSART_LPUART.SchDoc

rev B-02: modified parts: X2, C30, C34, C46, C63.rev B-03: added microSDcard, changed C30, C34rev C-01: added L4, L11, L12, C61, C62, C84, R72, R75 for EMC.

RESET#SWDIOSWCLK

USB_DMUSB_DP

TS_G1_IO2

TS_G6_IO2TS_G3_IO2

TS_G6_IO3TS_G3_IO3TS_G1_IO3TS_G8_IO1TS_G8_IO2

U_SWD_Touch_USBSWD_Touch_USB.SchDoc

UM

18

78E

lectrica

l sc

he

ma

tics

UM

1878

Re

v 251

/64

Figure 28. MCU

2 12

MCU

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


PE2 1

PE3 2

PE4 3

PE5 4

PE6 5

PC13-WKUP27

PC14-OSC32_IN8

PC15-OSC32_OUT9

PH0-OSC_IN12

PH1-OSC_OUT13

NRST14

PC015

PC116

PC217

PC318

PA023

PA124

PA225

PA326

PA429

PA530

PA631

PA732

PC433

PC534

PB0 35

PB1 36

PB2 37

PE7 38

PE8 39

PE9 40

PE10 41

PE11 42

PE12 43

PE13 44

PE14 45

PE15 46

PB10 47

PB11 48

PB12 51

PB13 52

PB14 53

PB15 54

PD8 55

PD9 56

PD10 57

PD11 58

PD12 59

PD13 60

PD14 61

PD15 62

PC663

PC764

PC865

PC966

PA867

PA968

PA1069

PA1170

PA1271

PA1372

PA1476

PA1577

PC1078

PC1179

PC1280

PD0 81

PD1 82

PD2 83

PD3 84

PD4 85

PD5 86

PD6 87

PD7 88

PB3 89

PB4 90

PB5 91

PB6 92

PB7 93

BOOT094

PB8 95

PB9 96

PE0 97

PE1 98

PH910

PH1011

U5A

STM32L073VZT6

R27

0

C121uF

VLCD1TP2

R26

0

C111uF

VLCD2TP4

R25

0

C101uF

VLCD3TP3

PE11PE12

PB2 R561K2

R531K2

VDD

I2C1_SDAI2C1_SCL

MFX_IRQOUTPE6

R55 0

R52 0

PB6PB7

PB5 LCDSEG9

C118100nF

R213[N/A]

X1

8MHz (with socket)

R42390

R3610K

231

SW1

09.032

90.01

D1

BAT60JFILM

D2BAT60JFILM

PH0PH1

JP3

R35150

1 432

B1RESET

VDD

VDD

Bootloader_BOOT0_3V3

Bootloader_RESET_3V3JP6

RESET#

BOOT0

BOOT0

C302.7pF

C342.7pF

R48

0

R49

0

PC14PC15

32.768 kHz crystal

LCDCOM1LCDCOM0

LCDCOM2LCDCOM3

LCDSEG11LCDSEG10

LCDSEG14LCDSEG17

LCDSEG16

LCDSEG15

LCDSEG20LCDSEG19

LCDSEG2LCDSEG1

LCDSEG5

LCDSEG7

LCDSEG6

LCDSEG21LCDSEG22LCDSEG23

LCDSEG24

LCDSEG25

LCDSEG26LCDSEG27

LCDSEG28LCDSEG29LCDSEG30LCDSEG31LCDSEG32LCDSEG33LCDSEG34LCDSEG35

LCDSEG36LCDSEG37LCDSEG38LCDSEG39

LCDSEG0

LCDCOM7

LCDCOM6LCDCOM5LCDCOM4

PB0PB1

PB3PB4

PB8PB9PB10PB11PB12PB13PB14PB15

PA4PA5PA6PA7

PA11PA12

PA9PA10

PA0PA1

PA15

PA3

PA13PA14

PA2

PA8

PC13

PD0PD1

PD3PD4PD5PD6

PD8PD9PD10PD11PD12PD13

PD2

PD14

PD7

PD15

PE0

PE14

PE9PE8

PE10

PE15

PE13

PE1PE2PE3PE4PE5

PE7

USART2_RX_3V3

USART2_CTS_3V3

USART2_TXUSART2_RTS

PC0PC1PC2PC3PC4PC5PC6PC7PC8PC9PC10PC11PC12

PH9PH10

SPI1_SCK

SPI1_MOSI

MicroSD_CS

TFT_CS

KEY

LED4

LED3

LED1LED2


PRESSURE

TS_G1_IO2 SB11Open by default

SB10Open by defaultTS_G1_IO3

DAC_OUT1

close to MCU

SB8Open by default

close to MCU

SB7Open by default

close to MCU

SB6

Open by default

close to MCU

SB15

Open by default

close to MCU

PB12 LCDSEG12

PB13 LCDSEG13

TS_G3_IO2

TS_G3_IO3

TS_G6_IO2

TS_G6_IO3

ADC_IN5

USB_DMUSB_DPSWDIO R45 0

SWCLK R51 0

POWER_CONTROL

SPI1_MISO_3V3

LCDSEG3

32

1

JP2

DET_DAC_OUT1 Detection demo

DAC_OUT

ADC_IN

SPI1_MOSI_DIR PH9

R46[N/A]

PH10

R47[N/A]

C28100nF

VDD_MCU

close to MCU

LCDSEG[0..39]LCDSEG[0..39]

LCDCOM[0..7]LCDCOM[0..7]

PA[0..15] PA[0..15]

PB[0..15] PB[0..15]

PC[0..15] PC[0..15]

PD[0..15] PD[0..15]

PE[0..15] PE[0..15]

RESET# RESET#

PH1

PH0PH0

PH1

PH10

PH9PH9

PH10

VLCD1

VLCD2VLCD3

WKUP3

MFX_WKUP

SB12Closed by default






C27

20pF

C25

20pF

X2

NDK NX3215SA-32.768KHZ-EXS00A-MU00525

SB17Open by default

close to MCU


SB24Open by default

close to MCU


TS_G8_IO1

TS_G8_IO2

= shortest as possible and clearance with other tracks Following circuitry is in Detection sheet

DET_COMP2_OUT

LCDSEG8

DET_COMP2_INPPB43

21

JP15

LCDSEG5

LCD

DET

JP16 SB34Open by default

LCDSEG4

32

1

JP1

LCDSEG5

LCD

DET


PA7

located close to MCU pin PA7


DET_LPTIM_CH132

1

JP17

LCDSEG19

LCD

DET


PC0LCDSEG18

Elec

trical s

ch

em

atic

sU

M1

878

52/6

4U

M1

878 R

ev 2

Figure 29. LCD glass external connector

3 12

LCD_Glass_Ext_connector

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 3637 3839 4041 4243 4445 4647 48

CN14

Header 24X2

PD11PD12PD13PD14PD15

PD10PD9PD8

PD2PC12PC11PC10

PC4PC5PC6PC7PCPC8PC9

PC3

PE0PE1PE2PE3PA1

LCDSEG21LCDSEG22LCDSEG23LCDSEG24LCDSEG25LCDSEG26LCDSEG27LCDSEG28LCDSEG29LCDSEG30LCDSEG31LCDSEG32LCDSEG33LCDSEG34LCDSEG35LCDSEG36LCDSEG37LCDSEG38LCDSEG39LCDSEG0

LCDCOM7LCDCOM6LCDCOM5LCDCOM4

LCDSEG[0..39]LCDSEG[0..39]

LCDCOM[0..7]LCDCOM[0..7]

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 3637 3839 4041 4243 4445 4647 48

CN10

Header 24X2

LCD Glass Connectors for module MB979

LCDCOM1 PA9PA8PA10

PA15

PA3PA2

PA7PA6

PB9PB11PB10PB5PB14PB13PB12

PB8

PB0

PB4PB3PB1

PB15PC2PC1PC0

LCDCOM0LCDCOM2LCDCOM3LCDSEG11LCDSEG10LCDSEG9LCDSEG14LCDSEG13LCDSEG12LCDSEG17LCDSEG16LCDSEG15LCDSEG20LCDSEG19LCDSEG18LCDSEG2LCDSEG1LCDSEG5LCDSEG4LCDSEG3LCDSEG8LCDSEG7LCDSEG6

LPUART_RX_3V3LPUART_TX

LPUART_CTS_3V3LPUART_RTS

TST_MOSI_DIRTempSensor_INT

EXT_RESET

R101

[N/A]

reserved use

R41 820

+3V3

PA[0..15] PA[0..15]

PB[0..15] PB[0..15]

PC[0..15] PC[0..15]

PD[0..15] PD[0..15]

PE[0..15] PE[0..15]

RESET# RESET#

Left Right

RESET#

PH1

PH0

SB23Open by default

SB25Open by default

close to MCU

D5V

PE8PE7R19 0

VDD

SB27Open by default

SB26Open by default

PC14

PC15

PH1

PH0PH0

PH1

BOOT0BOOT0

Upper connector Lower connector

Extension connectors

PE9 PE10PE11 PE12PE13 PE14

PE15 PA11PA12PA13PA14PD0PD1PD3PD5PD6

PD7

PB2PA5PA4PA0

PH1 PH0PH10 PH9

PC14 PC15PC13

PE6PE5 PE4BOOT0 PB7PB6

R39 820

PH10

PH9PH9

PH10

VLCD

R104 330

R106 10KR107 100K

Resistors for IDD production test

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 26

CN5

Header 13X2

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 26

CN4

Header 13X2

R103 330R102 330

Resistors for IDD production test

R105 1K

UM

18

78E

lectrica

l sc

he

ma

tics

UM

1878

Re

v 253

/64

Figure 30. Power

4 12

Power

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


SV1

SG2

CV 3

CG1 4

CG2 5

CG3 6

L8

BNX002-01

C96220uF

E5V

C9810uF[ESR<0.2ohm]

VDD_ADJ

+5VVDD_ADJ

TP24

1

32

CN18

DC-10BZ1SMAJ5.0A-TR C105

100nF

1

2

3

U27ZEN056V130A24LS

13

2RV13386P-503H[5%]

R14910.2K[1%]

Power Supply VDD_ADJ [1.65V to 3.61V]

R154

20K[1%]C824.7uF

Vout=1.22*(1+R1/R2)

C92100nF

VDD_MCUVDD

L6

BEAD32

1

JP12

VDDTP25

+3V3

VDD_ADJ

5VTP22

+5VR1531K

1 2

LD5Red

GNDTP23

D5V

U5V_STLINK

U5V

78563412

JP11

Header 4X2

E5V

EN1

GND

2

VO 4

ADJ 5GND

7

VI6 PG 3

U22ST1L05BPUR

+5V +3V3TP20

C794.7uF

R143

20.5K[1%]

R12911.8K[1%]

C8010uF[ESR<0.2ohm]

EN1

GND

2

VO 4

ADJ 5GND

7

VI6 PG 3

U20ST1L05BPUR

Power Supply 3.3VVout=1.22*(1+R1/R2)

C81100nF

+3V3

GNDTP1

VDDATP5

VDD_USBTP7

C831uF

C86100nF

GNDTP21

GNDTP10

connected by the shunt of IDD_measurement circuitry

VDD_MCUJP4

R147[N/A]

VDD_MCU

C37100nF

C33100nF

C20

1uF

C31

1uF

C13100nF

C14100nF

C29100nF

Recommendation:100nF decoupling capacitor close to each supply pin

VLCD6

VSS 49

VSS 74

VREF- 20VREF+21

VDDA22

VSS 27

VDD_USB75 VSS 99

VSSA 19

VDD100 VDD73 VDD50 VDD28U5B

STM32L073VZT6

VREF+TP6

VDD_MCUJP5

32

1

JP7

VDD_MCU

USB_VBUS3V3

R50

0

C351uF

VLCDTP8

C24

1uFC23100nF

R40

0

U5VUSB_VBUS3V3

TP9

C444.7uF

R58

20.5K[1%]

R5711.8K[1%]

C361uF

EN1

GND

2

VO 4

ADJ 5GND

7

VI6 PG 3

U6ST1L05BPUR

C32100nF

USB_VBUS3V3

R1481M

+5V

+3V3_PG

R150

0+3V3_PG

R1561M

+5V

VDD_PG

R60

820VDD_PG

C411nF

VDD_ANAR44

0

R43

[N/A]

VDDA

VDD_USB

VREF+

+3V3

C21100nF

VDD

AGND

L1

BEAD

VLCD

SB3Closed by defaultSB20Closed by defaultSB1Closed by defaultSB21Closed by defaultSB2Closed by defaultSB19Closed by default

C89[N/A]

L582μH 10%

SB38Open by default

AGND is the local ground plane of pressure sensor circuitry (refer to ADC16b_Pressure schematic sheet)

Elec

trical s

ch

em

atic

sU

M1

878

54/6

4U

M1

878 R

ev 2

Figure 31. Peripherals

5 12

Peripherals

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


SDA1

SCL2

OS/INT3

GND4 A2 5A1 6A0 7VDD 8U2

STLM75M2F

VDD

C3

100nF

VDD

VDD

I2C1_SCLI2C1_SDA R9 0

R10 0

R4 0

Temperature sensor

TempSensor_INT

PB7

R2 0R1 0

RF EEPROM MB1020 A-02 I2C address= 0xA6

PB6PB5

SDASCL 1 2

3 45 67 8

CN1

SSM-104-L-DH

RFEEPROM & Extension Connector

EXT_RESETPE2

R3[N/A]

VDD


VDD

By default SB4 closed: I2C address = 0x92

Operating voltage: 2.7V to 3.6V

R203100

COMMON5

Selection2

DWON3

LEFT1

RIGHT4

UP6

B3

MT008-A

JOY_SELJOY_DOWNJOY_LEFTJOY_RIGHTJOY_UP MFX

MFXMFXMFXMFX

DAC_OUT1

C15[N/A]

R280

Close to MCU

PA4

12

DAC_OUT1

CN3

R290

ADC_IN5

C2[N/A]

R70

Close to MCU

PA5

12

ADC_IN5

CN2

R80

WKUP/TAMPER Button

R215220K

143 2

B2WKUP

VDD

R214330

KEYPC13

12 LD1

Green

12

LD3Red

12 LD2

Orange

+3V3

R202510

R201680

R200680

R199680

LED4

LED3

LED1

LED2

PE4

12 LD4

Blue

PE5

PD1

PE7

VDD

+3V3

R1981K [1%]

R1961.15K [1%]

+5V

12

LD7Red

R2101K

6

57

U28B

TS3702IPT

2

31

48 U28A

TS3702IPT

12

LD8Orange

R2111K

12

LD9Green

R2121K

VDD

R19749.9 [1%]

VDD<1.71V

1.71V<VDD<1.8V

VDD>1.8V

+5V

C117100nF

R5

10K

R6

10K

(If SB4 opened: I2C address = 0x90)

RFEEPROM module MB1020 A-02is plugged in CN1 pins 1, 3, 5, 7

UM

18

78E

lectrica

l sc

he

ma

tics

UM

1878

Re

v 255

/64

Figure 32. TFT microSD

6 12

TFT_MicroSD

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


+3V3

MFX_MicroSD_detect

CS1

SCL2

SDI3

RS4

WR5

RD6

RESET8

VDD9

VCI10

SDO7

GND11

GND12

BL_VDD13

BL_Control14

BL_GND15

BL_GND16

CN162.4" LCD connector (MB895/S)

+3V3

TFT LCD

MFX

+5V

C11010uF

L9

BEADC111100nFL10

BEAD

+3V3

R128[N/A]

+3V3

R110[N/A]

+3V3

RVS1 CS2 DI3 Vdd4 SCLK5 Vss6 DO7 RVS8

SW2 9SW1 10CN13

PJS008-2000 (SMS064FF or SMS128FF)

PE10

PD0

R116

0

RESET#

+3V3

VDDR1454K7 R144 270

R11210K

R135 270

R114 0

SPI LCD

SPI MICRO SD

SPI1_MISO_3V3 PE14

Input pin with pull-up

SPI1_MOSI PE15R138 0

VCCA1

A12

A23

GND4 DIR 5B2 6B1 7VCCB 8U18

SN74LVC2T45DCUT

+3V3VDD

VDD

C77100nF

C71100nF

SPI1_MOSI_3V3

SPI1_MOSI_DIR

R117 10K

R118 0

SPI1_SCKVCCA1

A12

A23


SN74LVC2T45DCUT

+3V3VDD

VDD

C76100nF

C70100nF

SPI1_SCK_3V3PE13

R136100K

VDD

R137 0

VCCA1

A12

A23


SN74LVC2T45DCUT

+3V3VDD

VDD

C78100nF

C72100nF

PD0

R122100K

R121 0PE10MicroSD_CS

TFT_CS R140 0

R139100K

VDD

R120 [N/A]

R141 [N/A]

R119 0R142 0

PE13

PE15

PH9

TST_MOSI_DIR

SB40Closed by defaultSB41Open by default

3

4 5

G

S D

621

T11

STT5N2VH5

MB895/S LCD TFT 2.4 inches module is plugged in CN16

reserved use

ZZ1

micro SD card

L11

BEAD

L4

BEAD

L12

BEAD

C61N/A

R72 0R75 0

C84N/A

C62N/A

close to U17

close to U18

close to U19

R72, R75 close to CN16

Elec

trical s

ch

em

atic

sU

M1

878

56/6

4U

M1

878 R

ev 2

Figure 33. USART_LPUART

7 12

USART_LPUART

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


SD5

TxD3

GND8

Anode (VCC2)1

Cathode2

RxD4

VCC16

Vlogic7

U14

TFDU6300

+3V3

C684.7uF

C654.7uF

162738495

CN6DB9-male

USART2/IrDA_RX_3V3

USART2

Bootloader_BOOT0_3V3

Bootloader_RESET_3V3

C2+1

C2-2 V- 3

R1IN 4

R2IN 5

R3IN 6

R4IN 7

R5IN 8

T1OUT 9

T2OUT 10

T3OUT 11T3IN12 T2IN13 T1IN14

R5OUT15 R4OUT16 R3OUT17 R2OUT18 R1OUT19 R2OUTB20 R1OUTB21

nSHDN 22nEN23

C1-24 GND 25VCC 26

V+ 27

C1+28U7

ST3241EBPR

C45100nF

C38100nF

C43100nF

C39100nFC42100nF

+3V3

+3V3

RXDRTSTXDCTS

DSR

R91

0

USART2_CTS_3V3 PD3

R90 5.1

R92 47

PD6

USART2_RTS_3V3

PD4

VCCA1

A12

A23


SN74LVC2T45DCUT

+3V3VDD

VDD

C67100nF

C64100nF

R95100K

R94100K

VDD

USART2_RTS_3V3

R63 0

R93 0

R96 0

C69100nF

C66100nF

USART2_TX

IRDA

USART2_RTS

PD5

IRDA_RX

GND

GND

162738495

CN7DB9-male

LPUART_RX_3V3

LPUARTC2+1

C2-2 V- 3

R1IN 4

R2IN 5

R3IN 6

R4IN 7

R5IN 8

T1OUT 9

T2OUT 10

T3OUT 11T3IN12 T2IN13 T1IN14

R5OUT15 R4OUT16 R3OUT17 R2OUT18 R1OUT19 R2OUTB20 R1OUTB21

nSHDN 22nEN23

C1-24 GND 25VCC 26

V+ 27

C1+28U8

ST3241EBPR

C50100nF

C53100nF

C52100nF

C55100nFC51100nF

+3V3

+3V3

RXDRTSTXDCTS

DSR

LPUART_CTS_3V3 PD11

PD9

LPUART_RTS_3V3PD12

VCCA1

A12

A23


SN74LVC2T45DCUT

+3V3VDD

VDD

C56100nF

C60100nF

R89100K

R83100K

VDD

LPUART_RTS_3V3

LPUART_TX

LPUART_RTS

PD8

GND

GNDR62 0

R88 0

R61 0

R87 0

32

1

JP9

UM

18

78E

lectrica

l sc

he

ma

tics

UM

1878

Re

v 257

/64

Figure 34. Pressure sensor

8 12

ADC16b_Pressure

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


PRESSUREPA0

Pressure Sensor

R11220 0.1%

R1527400 0.1%

R1447K 0.1%

R1747K 0.1%

R3210K 0.1%

R3310K 0.1%

R2010K 0.1%

R22

20K 0.1%

V+

V-

3

21

48

U3ATSZ122IST

V+

V-

3

21

48

U4ATSZ122IST

5

67

U3BTSZ122IST

R21

20K 0.1%AGND

C6 1uF

AGND

C7 1uF

AGND

R34100

C1910uF

AGND

Vs3

GND1

Vout+ 2

Vout- 4

U1

MPXM2102AS

C1100nF

AGND

C8

100nF

C9

1uF

AGND

AGND

C17

100nF

C18

1uFAGND AGND

R1627400 0.1%

3Hz low-pass filter

Differential amplifier

Operating voltage: 3.3V

- AGND is the local ground plane of this section- AGND local ground plane is connected to GND by default using solder bridges SB1, SB2, SB3, SB19, SB20, SB21 or by a ferrite bead L1. (refer to Power sheet)- VDD_ANA is distributed in star scheme

VDD_ANA

5

67

U4BTSZ122IST

Spare operational amplifier

R30[N/A]

R24 0

R31

0R230

R38

0

C16 [N/A]

AGND

Elec

trical s

ch

em

atic

sU

M1

878

58/6

4U

M1

878 R

ev 2

Figure 35. LC sensor metering

9 12

LC Detection

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


C401nF

DET_COMP2_INP

12

External LC network

CN8

DET_COMP2_OUT

-Comp2

STM32L

PB4PA7

+

R67

0C57

[N/A]

R59

120

VDD/2 generation

AC ground

LC sensor

Internal comparator 2

CompOutTP18

VDD/2TP14

JP8

C46

100pF

C631nF R73

330K

R76330K

POWER_CONTROL

3

1

2

4

5

Vcc-

Vcc+

U9TSV631ILT

4

3

2

1

5

Vcc-

Vcc+

U11TSV911ILT

SB29

Closed by default

SB30

Closed by default

LC_H

LC_L

L3[N/A)

LC_H

LC_L

L 1

NC 2

NC 3

L 4

NC8

NC7

NC6

NC5

L

NC

NC

L

NC

NC

NC

NC

L2

100uH

Parts placed close to STM32L073

SB33

Open by default

SB32

Open by default

DET_DAC_OUT1C591nF

Comp2 INM input can be connected to DAC OUT1 using an internal switch of the MCU

C47[N/A]R64

330K

R54330K

PA4

PD7

SB31

Closed by default

close to MCU

TP18 located close to MCU pin PA7

DET_LPTIM_CH1 LPTIM inputPC0

C58100nF

Note *: Sensor inductors L2 or L3 are exclusive.Using a double PCB footprint.

see note *

see note *

UM

18

78E

lectrica

l sc

he

ma

tics

UM

1878

Re

v 259

/64

Figure 36. IDD measurement

10 12

IDD_measurement

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


VDD

R13310K [1%]

VDD_MCU

GND

VDD

C104100nF

GND

GND

R17022K

Current direction

to MCU


R1321K [1%]

R130100 [1%]

R13110 [1%]

R1341 [1%]

C100100nF

GND

GNDGND GND GND

GND

CAL

SH0 SH1 SH2 SH3

Shunts

3

4

5

G

SD

6

21

T10

STT7P2UH7

3

4

5

G

SD

6

21

T4

STT7P2UH7

3

4

5

G

SD

6

21

T2

STT7P2UH7

3

4

5

G

SD

6

21

T6

STT7P2UH7

3

4 5

G

S D

621

T8STT7P2UH7

C102

100nF

+3V3

V+

V-

3

21

48 U21A

TSZ122IST

V+

V-

3

21

48

U23ATSZ122IST

GND

+5V

C88100nF

GND


5

67

U21B

TSZ122IST

MFX_IRQOUT

MFX_SWCLK

CAL

SH2SH1

MFXMulti Function eXpander

MFX_SWDIO

IDD_MEAS

SH3

Note *: two footprints superimposed allows to populate also with SO-8 package P MOS transistors: STS7P2UH7, STS9P2UH7.

see note *

see note *

see note *

see note * see note *

SH1_D SH2_D SH3_DSH0_D

CAL_D

4

3

5

G

SD 6

78

21T9

STS9P2UH7

VDD

SH0_D

SH0

4

3

5

G

SD 6

78

21T7

STS9P2UH7

VDD

CAL_D

CAL

4

3

5

G

SD 6

78

21T3

STS9P2UH7SH1_D

SH1

4

3

5

G

SD 6

78

21T1

STS9P2UH7SH2_D

SH2

4

3

5

G

SD 6

78

21T5

STS9P2UH7SH3_D

SH3

CAL_D

CAL_D

CAL_D

R166 0PE6

MFX_SWDIOMFX_SWCLK

VDD

1 23 45

CN19

[N/A]

VDD

C116100nF

C94100nF

C91100nF

C106100nF

VDD one capacitor close to each MFX pins: VDD, VDD_1, VDD_2, VDD_3

C99100nF

SH0

VDD_MCU


R177 0R179 0PB6

PB7

MFX_WKUP

VDD

R174510

L7

BEAD C901uF C93

100nF

VDD

R176[N/A]

R171 10K

R189 10K

R190 10K

R191 10K

R188 10K

PE6 can also be used to wake-up the MCU

MFX_I2C_SDAMFX_I2C_SCL


R1580

XPTP27 [N/A]XNTP26 [N/A]

YPTP29 [N/A]

TP31

[N/A]

5

67

U23BTSZ122IST

32

1

JP10

bypass

R151100

C8710uF

R164100

C1011uF

GND

R1920

R180 0

R159

1K [0.1%]

R162

1K [0.1%]

R163

49K9 [0.1%]

R165

49K9 [0.1%]

R16910K

C95[N/A]

R155[N/A]

R1671K

R127100K

R124100KR126

100K

R123100K

R125100K

MFXMFXMFXMFXMFXMFX

R157100K


D8

BAT60JFILM

IDD_MEAS

MFX_V3WAKEUP2 NRST7

TSC_XP/GPO010

TSC_XN/GPO111

TSC_YP/GPO212

TSC_YN/GPO313

USART_TX21

USART_RX22

SPARE14

SWDIO34

SWCLK37

I2C_SCL42

I2C_SDA43

BOOT044

I2C_ADDR45

IRQOUT46

IDD_CAL/GPO4 3

IDD_SH0 4

IDD_SH1/GPO5 5

IDD_SH2/GPO6 6

IDD_MEAS 25

GPIO0 18

GPIO1 19

GPIO2 20

GPIO3 39

GPIO4 40

GPIO5 15

GPIO6 16

GPIO7 17

GPIO8 29

GPIO9 30

GPIO10 31

GPIO11 32

GPIO12 33

GPIO13 26

IDD_SH3/GPO7 38

GPIO14 27

GPIO15 28

IDD_VDD_MCU 41

VDD

1

VDDA

9

VDD_1

24

VDD_2

36

VDD_3

48

VSS

A8

VSS

_123

VSS

_235

VSS

_347

U25STM32L152CCT6

Elec

trical s

ch

em

atic

sU

M1

878

60/6

4U

M1

878 R

ev 2

Figure 37. SWD, Touch, USB

11 12

SWD_Touch_USB.SchDoc

MB1168 C-01

2/4/2016

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


1234567891011121314151617181920

CN11FTSH-110-01-L-DV

VDD

R100[N/A]

R108[N/A]

VDD

1234567891011121314151617181920

CN12VDD

VDD

R113 10K

R115 10K

R10910K

RESET#

SWDIOSWCLK

KEY

PA13PA14

SWD connectors

R99[N/A]

R98 22R97 22

R111 22

IO1 1

IO2 3

GND 2

IO34

IO45

U15

ESDALC6V1W5

U5V C49100nFI/O11

GND2

I/O23 I/O2 4Vbus 5I/O1 6U10

USBLC6-2P6 (optional)

U5V

R74100K

USB_DMUSB_DPR70 0

R69 0PA12PA11

TS_G1_IO2

TS_G6_IO2

TS_G3_IO2

TS_G6_IO3

TS_G3_IO3

TS_G1_IO3

PB12

PB13

PB0

PA1

PB1

C547nF

C447nF

C2247nF

PA2

Capacitors 47nF,5%,25V,NPO,0805 Kemet

R1810K

R1310K

R1210K

11

22

33

44

LS1

TS_G8_IO1

TS_G8_IO2

R37

10KPC6

C26220nF

GND

PC7

MICROB_NMICROB_P

VBUS 1

DM 2

DP 3

ID 4

GND 5

Shield 6

USB

_Micro-B

receptacle

Shield 7

Shield 8

Shield 9

EXP 10

EXP 11

CN9

1050170001

TS_Shield

USB

4 buttons touch sensing slider

UM

18

78E

lectrica

l sc

he

ma

tics

UM

1878

Re

v 261

/64

Figure 38. ST-LINK/V2-1

12 12

STLINK

MB1168 C-01

10/14/2015

Title:

Size: Reference:

Date: Sheet: of

A3 Revision:


VBAT1

PC132

PC143

PC154

OSC_IN5

OSC_OUT6

/RST7

VSSA8

VDDA9

PA010

PA111

U2_TX12

U2_

RX

13

U2_

CK

14

S1_C

K15

S1_M

ISO

16

S1_M

OSI

17

PB0

18

PB1

19

PB2/BOOT1

20

PB10

21

VSS

_123

VDD_1

24

PB12 25

PB11

22

S2_CK 26S2_MISO 27S2_MOSI 28PA8 29PA9 30PA10 31PA11 32PA12 33JTMS 34VSS_2 35VDD_2 36

JTCK

37JT

DI

38JT

DO

39JN

RST

40PB

541

PB6

42PB

743

BOOT0

44PB

845

PB9

46VSS

_347

VDD_3

48

U24STLINK

1 2X3

8MHz

STL_USB_DMSTL_USB_DP

STM_RST

T_JT

CK

T_JTCK

T_JT

DO

T_JT

DI

T_JTMS

STM_JTMS_SWDIO

STM_JTCK_SWCLK

LED_STLINK

OSC_INOSC_OUT

T_NRST

T_JR

ST

LED_STLINK

R186

4K7

R185

4K7

AIN_1C114100nF

R184

100K

VDD

STL_USB_DMSTL_USB_DP

C97100nF

C115100nF

C107100nF

C103100nF

R193 22R194 22

MCU

USB

STM_JTMS_SWDIOSTM_JTCK_SWCLK

VUSB_STLINK

SWIM_PU_CTRL

R175

100K

T_SWDIO_IN

T_SWO

R195

1.5K

R20710K

R20636K

R183[N/A]

R182

10K

R172100K

MCO

21 4

3

Red Yellow COM

LD6HSMF-A201-A00J1

R204100

R209100

R2080

USART4_RX_3V3

PWR_E

XT

PE9

USART4_TX PE8

R1870

R168 2K2 GND+5V

R205

100USB_RENUMn

USB_RENUMn

51

2

GND3

4

BYPASSINH

Vin Vout

U16LD3985M33R

C75

10nF

GNDGND

GND

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

+3V3_STLINK

PWR_ENn

VUSB_STLINK

R173 4K7C74

1uFC731uF

VCCA1

A12

A23


SN74LVC2T45DCUT

VDD

VDD

C109100nF

C108100nF

R178100K

3

1

2

T149013-SOT23

transistor pins numbers follow SOT23 JEDEC standard,

+3V3_STLINK

R181

0

D3

BAT60JFILMD4

BAT60JFILMD5

BAT60JFILMD6

BAT60JFILM

U5V

D5V

E5V

VUSB_STLINK

1 23 45

CN15

[N/A]

VCC 1

D- 2

D+ 3

GND 4

SHELL 6

SHELL 5

CN17

USB-typeB connector

+3V3_STLINK

T_SWDIO_IN

T_JTCK

T_NRST

T_JTMS

SWDIO

SWCLK

RESET#

USB Virtual ComPort: USART4

PA14

PA13

C11320pF

C11220pF

TP28

[N/A]

D7

BAT60JFILM

JP13

Power Switch to supply +5V from STLINK USB

IN1

IN2

ON3 GND 4

SET 5

OUT 6

OUT 7

FAULT8

U29ST890CDR

U5V_STLINK

R68 100K

R7110K

C54100nF

output current limitation : 600mA

R662K2

1 2

LD10RedR65

1K

C48100nF

VUSB_STLINK

Mechanical dimensions UM1878

62/64 UM1878 Rev 2

Appendix B Mechanical dimensions

Figure 39. Mechanical dimensions

UM1878 Rev 2 63/64

UM1878 Revision history

63

Revision history

Table 33. Document revision history

Date Revision Changes

16-Feb-2016 1 Initial version.

25-May-2018 2

Added Chapter 3: System requirements and Chapter 4: Development toolchains.

Updated Chapter 1: Features, Chapter 2: Product marking, Chapter 5: Demonstration software, and Chapter 6: Ordering information.

UM1878

64/64 UM1878 Rev 2

IMPORTANT NOTICE – PLEASE READ CAREFULLY

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.

No license, express or implied, to any intellectual property right is granted by ST herein.

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.

ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.

Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2018 STMicroelectronics – All rights reserved

um1878 user manual - stmicroelectronics...memory, 20-kbyte ram, 6-kbyte eeprom, touch sensing, usb...

Documents