sam l21 family data sheet - microchip...

SMART ARM-basedMicrocontrollers

SAM L21 Family Data Sheet

Introduction

Atmel | SMART SAM L21 is a series of Ultra low-power microcontrollers using the 32-bit ARM Cortex-M0+ processor at max. 48MHz (2.46 CoreMark/MHz) and up to 256KB Flash and 40KB of SRAM in a32, 48, and 64 pin package. The sophisticated power management technologies, such as power domaingating, SleepWalking, Ultra low-power peripherals and more, allow for very low current consumptions.The highly configurable peripherals include a touch controller supporting capacitive interfaces withproximity sensing.

Features

Processor ARM Cortex-M0+ CPU running at up to 48MHz

Single-cycle hardware multiplier Micro Trace Buffer

Memories 32/64/128/256KB in-system self-programmable Flash 1/2/4/8KB Flash Read-While-Write section 4/8/16/32KB SRAM Main Memory 2/4/8/8KB SRAM Low power Memory

System Power-on reset (POR) and brown-out detection (BOD) Internal and external clock options External Interrupt Controller (EIC) 16 external interrupts One non-maskable interrupt Two-pin Serial Wire Debug (SWD) programming, test and debugging interface

Low Power Idle, Standby, Backup, and Off sleep modes SleepWalking peripherals Static and Dynamic Power Gating Architecture Battery backup support Two Performance Levels Embedded Buck/LDO regulator supporting on-the-fly selection

Peripherals 16-channel Direct Memory Access Controller (DMAC)

2017 Microchip Technology Inc. Datasheet Complete 60001477A-page 1

12-channel Event System Up to five 16-bit Timer/Counters (TC) including one low-power TC, each configurable as:

16-bit TC with two compare/capture channels 8-bit TC with two compare/capture channels 32-bit TC with two compare/capture channels, by using two TCs

Two 24-bit and one 16-bit Timer/Counters for Control (TCC), with extended functions: Up to four compare channels with optional complementary output Generation of synchronized pulse width modulation (PWM) pattern across port pins Deterministic fault protection, fast decay and configurable dead-time between

complementary output Dithering that increase resolution with up to 5 bit and reduce quantization error

32-bit Real Time Counter (RTC) with clock/calendar function Watchdog Timer (WDT) CRC-32 generator One full-speed (12Mbps) Universal Serial Bus (USB) 2.0 interface

Embedded host and device function Eight endpoints

Up to six Serial Communication Interfaces (SERCOM) including one low-power SERCOM, eachconfigurable to operate as either:

USART with full-duplex and single-wire half-duplex configuration I2C up to 3.4MHz SPI LIN slave

One AES encryption engine One True Random Generator (TRNG) One Configurable Custom Logic (CCL) One 12-bit, 1MSPS Analog-to-Digital Converter (ADC) with up to 20 channels

Differential and single-ended input Automatic offset and gain error compensation Oversampling and decimation in hardware to support 13-, 14-, 15-, or 16-bit resolution

Two 12-bit, 1MSPS Dual Output Digital-to-Analog Converter (DAC) Two Analog Comparators (AC) with window compare function Three Operational Amplifiers (OPAMP) Peripheral Touch Controller (PTC)

169-Channel capacitive touch and proximity sensing Wake-up on touch in standby mode

Oscillators 32.768kHz crystal oscillator (XOSC32K) 0.4-32MHz crystal oscillator (XOSC) 32.768kHz internal oscillator (OSC32K) 32.768kHz ultra-low-power internal oscillator (OSCULP32K) 16/12/8/4MHz high-accuracy internal oscillator (OSC16M) 48MHz Digital Frequency Locked Loop (DFLL48M) 96MHz Fractional Digital Phased Locked Loop (FDPLL96M)

SMART ARM-based Microcontrollers


I/O Up to 51 programmable I/O pins

Easy migration from SAM D family Packages

64-pin TQFP, QFN, WLCSP 48-pin TQFP, QFN 32-pin TQFP, QFN

Operating Voltage 1.62V 3.63V

Temperature Range -40C to 85C -40C to 105C



Table of Contents

Introduction......................................................................................................................1

Features.......................................................................................................................... 1

1. Description...............................................................................................................14

2. Configuration Summary...........................................................................................16

3. Ordering Information................................................................................................193.1. SAM L21J...................................................................................................................................193.2. SAM L21G..................................................................................................................................203.3. SAM L21E.................................................................................................................................. 203.4. Device Identification................................................................................................................... 21

4. Block Diagram......................................................................................................... 23

5. Pinout...................................................................................................................... 255.1. SAM L21J...................................................................................................................................255.2. SAM L21J WLCSP64.................................................................................................................265.3. SAM L21G..................................................................................................................................275.4. SAM L21E.................................................................................................................................. 28

6. Signal Descriptions List........................................................................................... 29

7. I/O Multiplexing and Considerations........................................................................317.1. Multiplexed Signals.................................................................................................................... 317.2. Other Functions..........................................................................................................................33

8. Analog Connections of Peripherals......................................................................... 368.1. Block Diagram............................................................................................................................368.2. Analog Connections................................................................................................................... 368.3. Reference Voltages....................................................................................................................378.4. Analog ONDEMAND Function................................................................................................... 37

9. Power Supply and Start-Up Considerations............................................................ 399.1. Power Domain Overview............................................................................................................399.2. Power Supply Considerations.................................................................................................... 399.3. Power-Up................................................................................................................................... 429.4. Power-On Reset and Brown-Out Detector.................................................................................439.5. Performance Level Overview..................................................................................................... 44

10. Product Mapping..................................................................................................... 46

11. Memories.................................................................................................................4711.1. Embedded Memories................................................................................................................. 4711.2. Physical Memory Map................................................................................................................47



11.3. NVM User Row Mapping............................................................................................................4811.4. NVM Software Calibration Area Mapping...................................................................................4911.5. NVM Temperature Log Row.......................................................................................................5011.6. Serial Number............................................................................................................................ 50

12. Processor and Architecture..................................................................................... 5112.1. Cortex M0+ Processor............................................................................................................... 5112.2. Nested Vector Interrupt Controller..............................................................................................5312.3. Micro Trace Buffer......................................................................................................................5412.4. High-Speed Bus System............................................................................................................ 55

13. PAC - Peripheral Access Controller.........................................................................6013.1. Overview.................................................................................................................................... 6013.2. Features..................................................................................................................................... 6013.3. Block Diagram............................................................................................................................6013.4. Product Dependencies...............................................................................................................6013.5. Functional Description................................................................................................................6113.6. Register Summary......................................................................................................................6513.7. Register Description...................................................................................................................66

14. Peripherals Configuration Summary........................................................................82

15. DSU - Device Service Unit...................................................................................... 8515.1. Overview.................................................................................................................................... 8515.2. Features..................................................................................................................................... 8515.3. Block Diagram............................................................................................................................8615.4. Signal Description...................................................................................................................... 8615.5. Product Dependencies...............................................................................................................8615.6. Debug Operation........................................................................................................................8715.7. Chip Erase..................................................................................................................................8915.8. Programming..............................................................................................................................8915.9. Intellectual Property Protection.................................................................................................. 9015.10. Device Identification...................................................................................................................9115.11. Functional Description................................................................................................................9215.12. Register Summary..................................................................................................................... 9815.13. Register Description.................................................................................................................100

16. Clock System.........................................................................................................12216.1. Clock Distribution..................................................................................................................... 12216.2. Synchronous and Asynchronous Clocks..................................................................................12316.3. Register Synchronization......................................................................................................... 12416.4. Enabling a Peripheral...............................................................................................................12716.5. On Demand Clock Requests....................................................................................................12716.6. Power Consumption vs. Speed................................................................................................12816.7. Clocks after Reset....................................................................................................................128

17. GCLK - Generic Clock Controller.......................................................................... 12917.1. Overview.................................................................................................................................. 12917.2. Features................................................................................................................................... 129



17.3. Block Diagram..........................................................................................................................12917.4. Signal Description.................................................................................................................... 13017.5. Product Dependencies.............................................................................................................13017.6. Functional Description..............................................................................................................13117.7. Register Summary....................................................................................................................13717.8. Register Description.................................................................................................................141

18. MCLK Main Clock...............................................................................................14918.1. Overview.................................................................................................................................. 14918.2. Features................................................................................................................................... 14918.3. Block Diagram..........................................................................................................................14918.4. Signal Description.................................................................................................................... 14918.5. Product Dependencies.............................................................................................................14918.6. Functional Description..............................................................................................................15118.7. Register Summary - MCLK...................................................................................................... 15618.8. Register Description.................................................................................................................156

19. RSTC Reset Controller.......................................................................................17019.1. Overview.................................................................................................................................. 17019.2. Features................................................................................................................................... 17019.3. Block Diagram..........................................................................................................................17019.4. Signal Description.................................................................................................................... 17119.5. Product Dependencies.............................................................................................................17119.6. Functional Description..............................................................................................................17219.7. Register Summary....................................................................................................................17519.8. Register Description.................................................................................................................175

20. PM Power Manager............................................................................................18020.1. Overview.................................................................................................................................. 18020.2. Features................................................................................................................................... 18020.3. Block Diagram..........................................................................................................................18120.4. Signal Description.................................................................................................................... 18120.5. Product Dependencies.............................................................................................................18120.6. Functional Description..............................................................................................................18220.7. Register Summary....................................................................................................................20520.8. Register Description.................................................................................................................205

21. OSCCTRL Oscillators Controller........................................................................ 21121.1. Overview...................................................................................................................................21121.2. Features................................................................................................................................... 21121.3. Block Diagram.......................................................................................................................... 21121.4. Signal Description.....................................................................................................................21121.5. Product Dependencies.............................................................................................................21221.6. Functional Description..............................................................................................................21321.7. Register Summary....................................................................................................................22421.8. Register Description.................................................................................................................225

22. OSC32KCTRL 32KHz Oscillators Controller......................................................25022.1. Overview.................................................................................................................................. 250



22.2. Features................................................................................................................................... 25022.3. Block Diagram..........................................................................................................................25122.4. Signal Description.................................................................................................................... 25122.5. Product Dependencies.............................................................................................................25122.6. Functional Description..............................................................................................................25322.7. Register Summary....................................................................................................................25722.8. Register Description.................................................................................................................257

23. SUPC Supply Controller.....................................................................................26823.1. Overview.................................................................................................................................. 26823.2. Features................................................................................................................................... 26823.3. Block Diagram..........................................................................................................................26923.4. Signal Description.................................................................................................................... 26923.5. Product Dependencies.............................................................................................................26923.6. Functional Description..............................................................................................................27123.7. Register Summary....................................................................................................................27923.8. Register Description.................................................................................................................280

24. WDT Watchdog Timer........................................................................................ 29624.1. Overview.................................................................................................................................. 29624.2. Features................................................................................................................................... 29624.3. Block Diagram..........................................................................................................................29724.4. Signal Description.................................................................................................................... 29724.5. Product Dependencies.............................................................................................................29724.6. Functional Description..............................................................................................................29824.7. Register Summary....................................................................................................................30424.8. Register Description.................................................................................................................304

25. RTC Real-Time Counter..................................................................................... 31125.1. Overview...................................................................................................................................31125.2. Features................................................................................................................................... 31125.3. Block Diagram.......................................................................................................................... 31125.4. Signal Description.................................................................................................................... 31225.5. Product Dependencies.............................................................................................................31225.6. Functional Description..............................................................................................................31425.7. Register Summary - COUNT32................................................................................................32025.8. Register Description - COUNT32.............................................................................................32125.9. Register Summary - COUNT16................................................................................................33225.10. Register Description - COUNT16.............................................................................................33325.11. Register Summary - CLOCK....................................................................................................34325.12. Register Description - CLOCK................................................................................................. 344

26. DMAC Direct Memory Access Controller........................................................... 35626.1. Overview.................................................................................................................................. 35626.2. Features................................................................................................................................... 35626.3. Block Diagram..........................................................................................................................35826.4. Signal Description.................................................................................................................... 35826.5. Product Dependencies.............................................................................................................35826.6. Functional Description..............................................................................................................359



26.7. Register Summary....................................................................................................................37926.8. Register Description.................................................................................................................38026.9. Register Summary - LP SRAM.................................................................................................40626.10. Register Description - LP SRAM..............................................................................................406

27. EIC External Interrupt Controller........................................................................ 41327.1. Overview.................................................................................................................................. 41327.2. Features................................................................................................................................... 41327.3. Block Diagram..........................................................................................................................41327.4. Signal Description.................................................................................................................... 41427.5. Product Dependencies.............................................................................................................41427.6. Functional Description..............................................................................................................41527.7. Register Summary....................................................................................................................42027.8. Register Description.................................................................................................................420

28. NVMCTRL Non-Volatile Memory Controller....................................................... 43028.1. Overview.................................................................................................................................. 43028.2. Features................................................................................................................................... 43028.3. Block Diagram..........................................................................................................................43028.4. Signal Description.................................................................................................................... 43128.5. Product Dependencies.............................................................................................................43128.6. Functional Description..............................................................................................................43228.7. Register Summary....................................................................................................................43928.8. Register Description.................................................................................................................439

29. PORT - I/O Pin Controller......................................................................................44929.1. Overview.................................................................................................................................. 44929.2. Features................................................................................................................................... 44929.3. Block Diagram..........................................................................................................................45029.4. Signal Description.................................................................................................................... 45029.5. Product Dependencies.............................................................................................................45029.6. Functional Description..............................................................................................................45329.7. Register Summary....................................................................................................................45929.8. PORT Pin Groups and Register Repetition..............................................................................46129.9. Register Description.................................................................................................................461

30. EVSYS Event System........................................................................................ 47830.1. Overview.................................................................................................................................. 47830.2. Features................................................................................................................................... 47830.3. Block Diagram..........................................................................................................................47830.4. Signal Description.................................................................................................................... 47930.5. Product Dependencies.............................................................................................................47930.6. Functional Description..............................................................................................................48030.7. Register Summary....................................................................................................................48430.8. Register Description.................................................................................................................485

31. SERCOM Serial Communication Interface.........................................................50131.1. Overview.................................................................................................................................. 50131.2. Features................................................................................................................................... 501



31.3. Block Diagram..........................................................................................................................50231.4. Signal Description.................................................................................................................... 50231.5. Product Dependencies.............................................................................................................50231.6. Functional Description..............................................................................................................504

32. SERCOM USART SERCOM Universal Synchronous and Asynchronous Receiverand Transmitter......................................................................................................51032.1. Overview.................................................................................................................................. 51032.2. USART Features...................................................................................................................... 51032.3. Block Diagram.......................................................................................................................... 51132.4. Signal Description.....................................................................................................................51132.5. Product Dependencies............................................................................................................. 51132.6. Functional Description..............................................................................................................51332.7. Register Summary....................................................................................................................52532.8. Register Description.................................................................................................................525

33. SERCOM SPI SERCOM Serial Peripheral Interface..........................................54233.1. Overview.................................................................................................................................. 54233.2. Features................................................................................................................................... 54233.3. Block Diagram..........................................................................................................................54333.4. Signal Description.................................................................................................................... 54333.5. Product Dependencies.............................................................................................................54333.6. Functional Description..............................................................................................................54533.7. Register Summary....................................................................................................................55433.8. Register Description.................................................................................................................555

34. SERCOM I2C SERCOM Inter-Integrated Circuit................................................ 56834.1. Overview.................................................................................................................................. 56834.2. Features................................................................................................................................... 56834.3. Block Diagram..........................................................................................................................56934.4. Signal Description.................................................................................................................... 56934.5. Product Dependencies.............................................................................................................56934.6. Functional Description..............................................................................................................57134.7. Register Summary - I2C Slave.................................................................................................58934.8. Register Description - I2C Slave...............................................................................................58934.9. Register Summary - I2C Master...............................................................................................60434.10. Register Description - I2C Master............................................................................................ 605

35. TC Timer/Counter...............................................................................................62135.1. Overview.................................................................................................................................. 62135.2. Features................................................................................................................................... 62135.3. Block Diagram..........................................................................................................................62235.4. Signal Description.................................................................................................................... 62235.5. Product Dependencies.............................................................................................................62335.6. Functional Description..............................................................................................................62435.7. Register Description.................................................................................................................639

36. TCC Timer/Counter for Control Applications...................................................... 691



36.1. Overview.................................................................................................................................. 69136.2. Features................................................................................................................................... 69136.3. Block Diagram..........................................................................................................................69236.4. Signal Description.................................................................................................................... 69236.5. Product Dependencies.............................................................................................................69336.6. Functional Description..............................................................................................................69436.7. Register Summary....................................................................................................................72836.8. Register Description.................................................................................................................730

37. TRNG True Random Number Generator............................................................76637.1. Overview.................................................................................................................................. 76637.2. Features................................................................................................................................... 76637.3. Block Diagram..........................................................................................................................76637.4. Signal Description.................................................................................................................... 76637.5. Product Dependencies.............................................................................................................76637.6. Functional Description..............................................................................................................76737.7. Register Summary....................................................................................................................77037.8. Register Description.................................................................................................................770

38. AES Advanced Encryption Standard..................................................................77438.1. Overview.................................................................................................................................. 77438.2. Features................................................................................................................................... 77438.3. Block Diagram..........................................................................................................................77538.4. Signal Description.................................................................................................................... 77638.5. Product Dependencies.............................................................................................................77638.6. Functional Description..............................................................................................................77738.7. Register Summary....................................................................................................................78638.8. Register Description.................................................................................................................788

39. USB Universal Serial Bus...................................................................................80239.1. Overview.................................................................................................................................. 80239.2. Features................................................................................................................................... 80239.3. USB Block Diagram..................................................................................................................80339.4. Signal Description.................................................................................................................... 80339.5. Product Dependencies.............................................................................................................80339.6. Functional Description..............................................................................................................80539.7. Register Summary....................................................................................................................82339.8. Register Description.................................................................................................................827

40. CCL Configurable Custom Logic........................................................................88040.1. Overview.................................................................................................................................. 88040.2. Features................................................................................................................................... 88040.3. Block Diagram..........................................................................................................................88140.4. Signal Description.................................................................................................................... 88140.5. Product Dependencies.............................................................................................................88140.6. Functional Description..............................................................................................................88340.7. Register Summary....................................................................................................................89340.8. Register Description.................................................................................................................893



41. OPAMP Operational Amplifier Controller............................................................89741.1. Overview.................................................................................................................................. 89741.2. Features................................................................................................................................... 89741.3. Block Diagram..........................................................................................................................89841.4. Signal Description.................................................................................................................... 89841.5. Product Dependencies.............................................................................................................89941.6. Functional Description..............................................................................................................90041.7. Register Summary....................................................................................................................91241.8. Register Description.................................................................................................................912

42. ADC Analog-to-Digital Converter........................................................................91842.1. Overview.................................................................................................................................. 91842.2. Features................................................................................................................................... 91842.3. Block Diagram..........................................................................................................................91942.4. Signal Description.................................................................................................................... 91942.5. Product Dependencies.............................................................................................................91942.6. Functional Description..............................................................................................................92142.7. Register Summary....................................................................................................................93442.8. Register Description.................................................................................................................935

43. AC Analog Comparators.....................................................................................95343.1. Overview.................................................................................................................................. 95343.2. Features................................................................................................................................... 95343.3. Block Diagram..........................................................................................................................95443.4. Signal Description.................................................................................................................... 95443.5. Product Dependencies.............................................................................................................95443.6. Functional Description..............................................................................................................95643.7. Register Summary....................................................................................................................96543.8. Register Description.................................................................................................................965

44. DAC Digital-to-Analog Converter........................................................................97844.1. Overview.................................................................................................................................. 97844.2. Features................................................................................................................................... 97844.3. Block Diagram..........................................................................................................................97844.4. Signal Description.................................................................................................................... 97944.5. Product Dependencies.............................................................................................................97944.6. Functional Description..............................................................................................................98144.7. Register Summary....................................................................................................................98944.8. Register Description.................................................................................................................989

45. PTC - Peripheral Touch Controller.......................................................................100345.1. Overview................................................................................................................................ 100345.2. Features................................................................................................................................. 100345.3. Block Diagram........................................................................................................................100445.4. Signal Description.................................................................................................................. 100445.5. Product Dependencies...........................................................................................................100445.6. Functional Description............................................................................................................1006



46. Electrical Characteristics..................................................................................... 100846.1. Disclaimer...............................................................................................................................100846.2. Absolute Maximum Ratings....................................................................................................100846.3. General Operating Ratings.....................................................................................................100846.4. Supply Characteristics............................................................................................................100946.5. Maximum Clock Frequencies.................................................................................................101046.6. Power Consumption............................................................................................................... 101146.7. Wake-Up Time........................................................................................................................101546.8. I/O Pin Characteristics............................................................................................................101646.9. Injection Current.....................................................................................................................101846.10. Analog Characteristics........................................................................................................... 101846.11. NVM Characteristics...............................................................................................................103446.12. Oscillators Characteristics......................................................................................................103546.13. Timing Characteristics............................................................................................................104246.14. USB Characteristics...............................................................................................................1046

47. Electrical Characteristics - Extended Temperature Range 105C.......................104847.1. Disclaimer...............................................................................................................................104847.2. General Operating Ratings - 105C....................................................................................... 104847.3. Power Consumption...............................................................................................................104847.4. I/O Pin Characteristics............................................................................................................105347.5. Injection Current - 105C........................................................................................................105447.6. Analog Characteristics........................................................................................................... 105547.7. NVM Characteristics...............................................................................................................106547.8. Oscillators Characteristics......................................................................................................106647.9. Timing Characteristics............................................................................................................1073

48. Typical Characteristics.........................................................................................107748.1. Power Consumption over Temperature in Sleep Modes........................................................1077

49. Packaging Information.........................................................................................107949.1. Thermal Considerations......................................................................................................... 107949.2. Package Drawings................................................................................................................. 108049.3. Soldering Profile.....................................................................................................................1089

50. Schematic Checklist............................................................................................ 109050.1. Introduction.............................................................................................................................109050.2. Power Supply......................................................................................................................... 109050.3. External Analog Reference Connections............................................................................... 109350.4. External Reset Circuit.............................................................................................................109450.5. Unused or Unconnected Pins.................................................................................................109550.6. Clocks and Crystal Oscillators................................................................................................109550.7. Programming and Debug Ports..............................................................................................109850.8. USB Interface......................................................................................................................... 1102

51. Errata................................................................................................................... 110451.1. Die Revision A........................................................................................................................ 110451.2. Die Revision B........................................................................................................................ 1117



51.3. Die Revision C........................................................................................................................1123

52. Conventions.........................................................................................................112952.1. Numerical Notation................................................................................................................. 112952.2. Memory Size and Type...........................................................................................................112952.3. Frequency and Time...............................................................................................................112952.4. Registers and Bits.................................................................................................................. 1130

53. Acronyms and Abbreviations............................................................................... 1131

54. Datasheet Revision History................................................................................. 113454.1. Rev. A - 02/2017.....................................................................................................................113454.2. Rev J - 06/2016...................................................................................................................... 113654.3. Rev I - 02/2016....................................................................................................................... 113854.4. Rev H - 12/2015..................................................................................................................... 114054.5. Rev G - 11/2015......................................................................................................................114054.6. Rev F - 09/2015......................................................................................................................114354.7. Rev E - 07/2015......................................................................................................................114554.8. Rev D - 06/2015..................................................................................................................... 114654.9. Rev C - 03/2015..................................................................................................................... 114854.10. Rev B - 02/2015..................................................................................................................... 114954.11. Rev A - 01/2015......................................................................................................................1150

The Microchip Web Site.............................................................................................1151

Customer Change Notification Service......................................................................1151

Customer Support......................................................................................................1151

Product Identification System.................................................................................... 1152

Microchip Devices Code Protection Feature............................................................. 1152

Legal Notice...............................................................................................................1153

Trademarks................................................................................................................1153

Quality Management System Certified by DNV.........................................................1154

Worldwide Sales and Service.................................................................................... 1155



1. DescriptionAtmel | SMART SAM L21 is a series of Ultra low-power microcontrollers using the 32-bit ARM Cortex-M0+ processor, and ranging from 32- to 64-pins with up to 256KB Flash and 40KB of SRAM. The SAML21 devices operate at a maximum frequency of 48MHz and reach 2.46 CoreMark/MHz. They aredesigned for simple and intuitive migration with identical peripheral modules, hex compatible code,identical linear address map and pin compatible migration paths between all devices in the productseries. All devices include intelligent and flexible peripherals, Atmel Event System for inter-peripheralsignaling, and support for capacitive touch button, slider and wheel user interfaces.

The Atmel SAM L21 devices provide the following features: In-system programmable Flash, 16-channeldirect memory access (DMA) controller, 12-channel Event System, programmable interrupt controller, upto 51 programmable I/O pins, 32-bit real-time clock and calendar, up to five 16-bit Timer/Counters (TC)and three Timer/Counters for Control (TCC) where each TC/TCC can be configured to perform frequencyand waveform generation, accurate program execution timing or input capture with time and frequencymeasurement of digital signals. The TCs can operate in 8- or 16-bit mode, selected TCs can be cascadedto form a 32-bit TC, and three timer/counters have extended functions optimized for motor, lighting andother control applications. Two TCC can operate in 24-bit mode, the third TCC can operate in 16-bitmode. The series provide one full-speed USB 2.0 embedded host and device interface; up to six SerialCommunication Modules (SERCOM) that each can be configured to act as an USART, UART, SPI, I2C upto 3.4MHz, SMBus, PMBus, and LIN slave; up to twenty channel 1MSPS 12-bit ADC with programmablegain and optional oversampling and decimation supporting up to 16-bit resolution, two 12-bit 1MSPSDACs, two analog comparators with window mode, three independent cascadable OPAMPs supportinginternal connection with others analog features, Peripheral Touch Controller supporting up to 192 buttons,sliders, wheels and proximity sensing; programmable Watchdog Timer, brown-out detector and power-onreset and two-pin Serial Wire Debug (SWD) program and debug interface.

All devices have accurate and low-power external and internal oscillators. All oscillators can be used as asource for the system clock. Different clock domains can be independently configured to run at differentfrequencies, enabling power saving by running each peripheral at its optimal clock frequency, and thusmaintaining a high CPU frequency while reducing power consumption.

The SAM L21 devices have four software-selectable sleep modes, idle, standby, backup and off. In idlemode the CPU is stopped while all other functions can be kept running. In standby all clocks andfunctions are stopped except those selected to continue running. In this mode all RAMs and logiccontents are retained. The device supports SleepWalking. This feature allows the peripheral to wake upfrom sleep based on predefined conditions, and thus allows some internal operation like DMA transferand/or the CPU to wake up only when needed, e.g. when a threshold is crossed or a result is ready. TheEvent System supports synchronous and asynchronous events, allowing peripherals to receive, react toand send events even in standby mode.

The SAM L21 devices have two software-selectable performance levels (PL0 and PL2) allowing the userto scale the lowest core voltage level that will support the operating frequency. To further minimizeconsumption, specifically leakage dissipation, the SAM L21 devices utilizes power domain gatingtechnique with retention to turn off some logic area while keeping its logic state. This technique is fullyhandled by hardware.

The Flash program memory can be reprogrammed in-system through the SWD interface. The sameinterface can be used for nonintrusive on-chip debugging of application code. A boot loader running in thedevice can use any communication interface to download and upgrade the application program in theFlash memory.



The Atmel SAM L21 devices are supported with a full suite of programs and system development tools,including C compilers, macro assemblers, program debugger/simulators, programmers and evaluationkits.



2. Configuration SummarySAM L21J SAM L21G SAM L21E

Pins 64 48 32

General Purpose I/O-pins (GPIOs)

51 37 25

Flash 256/128/64KB 256/128/64KB 256/128/64/32KB

Flash RWW section 8/4/2KB 8/4/2KB 8/4/2/1KB

System SRAM 32/16/8KB 32/16/8KB 32/16/8/4KB

Low Power SRAM 8/8/4KB 8/8/4KB 8/8/4/2KB

Timer Counter (TC)instances(1)

5 3 3

Waveform outputchannels per TCinstance

2 2 2

Timer Counter forControl (TCC) instances

3 3 3

Waveform outputchannels per TCC

8/4/2 8/4/2 6/4/2

DMA channels 16 16 16

USB interface 1 1 1

AES engine 1 1 1

Configurable CustomLogic (CCL) (LUTs)

4 4 4

True Random Generator(TRNG)

1 1 1

Serial CommunicationInterface (SERCOM)instances

6 6 6

Analog-to-DigitalConverter (ADC)channels

20 14 10

Analog Comparators(AC)

2 2 2

Digital-to-AnalogConverter (DAC)channels

2 2 2

Operational Amplifier(OPAMP)

3 3 3



SAM L21J SAM L21G SAM L21E

Real-Time Counter(RTC)

Yes Yes Yes

RTC alarms 1 1 1

RTC compare values One 32-bit value or

two 16-bit values

One 32-bit value or

two 16-bit values

One 32-bit value or

two 16-bit values

External Interrupt lines 16 16 16

Peripheral TouchController (PTC)channels (X- x Y-Lines)for mutual capacitance (2)

169 (13x13) 81 (9x9) 42 (7x6)

Peripheral TouchController (PTC)channels for selfcapacitance (Y-Linesonly) (3)

16 10 7

Maximum CPUfrequency

48MHz

Packages QFN

TQFP

WLCSP(4)

QFN

TQFP

QFN

TQFP

Oscillators 32.768kHz crystal oscillator (XOSC32K)

0.4-32MHz crystal oscillator (XOSC)

32.768kHz internal oscillator (OSC32K)

32KHz ultra-low-power internal oscillator (OSCULP32K)

16/12/8/4MHz high-accuracy internal oscillator (OSC16M)

48MHz Digital Frequency Locked Loop (DFLL48M)

96MHz Fractional Digital Phased Locked Loop (FDPLL96M)

Event System channels 12 12 12

SW Debug Interface Yes Yes Yes

Watchdog Timer (WDT) Yes Yes Yes

Note:1. For SAM L21E and SAM L21G, only TC0, TC1 and TC4 are available.2. The number of X- and Y-lines depends on the configuration of the device, as some I/O lines can be

configured as either X-lines or Y-lines. Refer to Multiplexed Signals for details. The number in theConfiguration Summary is the maximum number of channels that can be obtained.



3. The number of Y-lines depends on the configuration of the device, as some I/O lines can beconfigured as either X-lines or Y-lines. The number given here is the maximum number of Y-linesthat can be obtained.

4. WLCSP parts are programmed with a specific SPI bootloader. Refer to Application Note AT09002for details.

Related LinksMultiplexed Signals



3. Ordering Information

SAML 21 E 15 B - M U T

Product FamilySAML = Low Power ULP Microcontroller

21 = Cortex M0+ CPU, Advanced Feature Set

E = 32 Pins

T = Tape and Reel

U = -40 to 85C Matte Sn PlatingN = -40 to 105C Matte Sn Plating

A = TQFPM = QFNU = WLCSP

+ DMA + USB

Product Series

Flash Memory Density

Device VariantA = Engineering Samples OnlyB = Released to Production

Pin Count

Package Carrier

Package Grade

Package Type

18 = 256KB17 = 128KB16 = 64KB15 = 32KB

G = 48 PinsJ = 64 Pins

Note: The device variant (last letter of the ordering number) is independent of the die revision(DSU.DID.REVISION): The device variant denotes functional differences, whereas the die revision marksevolution of the die.

3.1 SAM L21JTable 3-1.SAM L21J Ordering Codes

Ordering Code FLASH(bytes)

SRAM(bytes)

Package Carrier Type

ATSAML21J16B-AUT 64K 8K -40C to85C

TQFP64 Tape & Reel

ATSAML21J16B-MUT QFN64

ATSAML21J16B-ANT -40C to105C

TQFP64

ATSAML21J16B-MNT QFN64


TQFP64 Tape & Reel


ATSAML21J17B-UUT WLCSP64


TQFP64



TQFP64 Tape & Reel


ATSAML21J18B-UUT WLCSP64




SRAM(bytes)



TQFP64


3.2 SAM L21GTable 3-2.SAM L21G Ordering Codes


SRAM(bytes)


ATSAML21G16B-AUT 64K 8K -40C to85C

TQFP48 Tape & Reel

ATSAML21G16B-MUT QFN48

ATSAML21G16B-ANT -40C to105C

TQFP48

ATSAML21G16B-MNT QFN48


TQFP48 Tape & Reel



TQFP48



TQFP48 Tape & Reel



TQFP48


3.3 SAM L21ETable 3-3.SAM L21E


SRAM(bytes)

TemperatureRange


ATSAML21E15B-AUT 32K 4K -40C to85C

TQFP32 Tape & Reel

ATSAML21E15B-MUT QFN32

ATSAML21E15B-ANT -40C to105C

TQFP32

ATSAML21E15B-MNT QFN32


TQFP32 Tape & Reel



TQFP32





SRAM(bytes)

TemperatureRange



TQFP32 Tape & Reel



TQFP32



TQFP32 Tape & Reel



TQFP32


3.4 Device IdentificationThe DSU - Device Service Unit peripheral provides the Device Selection bits in the Device Identificationregister (DID.DEVSEL) in order to identify the device by software. The SAM L21 variants have a resetvalue of DID=0x1081drxx, with the LSB identifying the die number ('d'), the die revision ('r') and thedevice selection ('xx').

Table 3-4.SAM L21 Device Identification Values

DEVSEL (DID[7:0]) Device

0x00 SAML21J18A

0x01 SAML21J17A

0x02 SAML21J16A

0x03-0x04 Reserved

0x05 SAML21G18A

0x06 SAML21G17A

0x07 SAML21G16A

0x08-0x09 Reserved

0x0A SAML21E18A

0x0B SAML21E17A

0x0C SAML21E16A

0x0D SAML21E15A

0x0E Reserved

0x0F SAML21J18B

0x10 SAML21J17B

0x11 SAML21J16B

0x12-0x13 Reserved



DEVSEL (DID[7:0]) Device

0x14 SAML21G18B

0x15 SAML21G17B

0x16 SAML21G16B

0x17-0x18 Reserved

0x19 SAML21E18B

0x1A SAML21E17B

0x1B SAML21E16B

0x1C SAML21E15B

0x1D-0xFF Reserved

Note: The device variant (last letter of the ordering number) is independent of the die revision(DSU.DID.REVISION): The device variant denotes functional differences, whereas the die revision marksevolution of the die.

Related LinksDSU - Device Service UnitDID



4. Block Diagram

6 x SERCOM

8 x Timer Counter

REAL TIMECOUNTER

AHB-APBBRIDGE D

M

M

LOW POWERBUS MATRIX

POR

T

POR

TWATCHDOGTIMER

S

AHB-APBBRIDGE A

20-CHANNEL12-bit ADC 1MSPS

AIN[19..0]VREFA

AIN[3..0]

S

LP SRAMCONTROLLER

8/8/4/2KBRAM

4 x TIMER / COUNTER

S

5 x SERCOM

2 ANALOGCOMPARATORS

OSCILLATORS CONTROLLER

XOUTXIN

XOUT32XIN32

OSCULP32K

OSC32K

OSC16M

DFLL48M

XOSC32K

XOSC

X[15..0]

Y[15..0]

PERIPHERALTOUCH

CONTROLLER

AHB-APBBRIDGE E

VREFAVOUT[1..0]

12-bit DAC 1MSPS

EXTERNAL INTERRUPTCONTROLLER

MAIN CLOCKSCONTROLLER

PERIPHERALACCESS

CONTROLLER

EXTINT[15..0]NMI

GCLK_IO[7..0]

S

PAD0

WO1

PAD1PAD2PAD3

WO0

VREFB

DMA

3x TIMER / COUNTERFOR CONTROL WOn

FDPLL96M

DMA

DMA

DMA

DMA

DMA

S

WO0WO1

(2)

GENERIC CLOCKCONTROLLER

POWERMANAGER

RESETCONTROLLER

OSC32K CONTROLLER

SUPPLY CONTROLLER

VREFBOD33

VREG

AHB-APBBRIDGE C

SERCOM

PAD0PAD1PAD2PAD3

TIMER / COUNTER WO1WO0DMA

AESDMA

TRNGDMA

3 x OPAMP

OA_NEGOA_POSOA_OUT

4 x CCLIN[2..0]OUT

M

HIGH SPEEDBUS MATRIX

SERIALWIRESWDIO

S

CORTEX-M0+PROCESSORFmax 48 MHz

SWCLK

DEVICESERVICE

UNIT

S

SRAMCONTROLLER

32/16/8/4KBRAM

M

S

256/128/64/32KBNVM

NVMCONTROLLER

Cache

S

USB FSDEVICE

MINI-HOST

DP

DM

IOBUS

MEM

OR

YTR

ACE

BUFF

ER

S

SOF 1KHZM

AHB-APBBRIDGE B

S

Dual Channels

RESETEXTWAKEx

EVEN

T SY

STEM

EVEN

T

EVENT

EVEN

T

EVENT

EVENT

EVENT

EVENT

EVENT

EVENT

EVENTEVENT

Note:1. Some products have different number of SERCOM instances, Timer/Counter instances, PTC

signals and ADC signals. Refer to Peripherals Configuration Summary for details.



2. The three TCC instances have different configurations, including the number of Waveform Output(WO) lines.



5. Pinout

5.1 SAM L21J

PA00 1PA01 2PA02 3PA03 4PB04 5PB05 6

GNDANA 7VDDANA 8

PB06 9PB07 10PB08 11PB09 12PA04 13PA05 14PA06 15PA07 16

PA08

17PA

0918

PA10

19PA

1120

VDD

IO21

GN

D22

PB10

23PB

11

24

PB12

25PB

1326

PB14

27PB

1528

PA12

29PA

1330

PA14

31PA

1532

VDDIO48GND47PA2546PA2445PA2344PA2243PA2142PA2041PB1740PB1639PA1938PA1837PA1736PA1635VDDIO34GND33

PB22

49PB

2350

PA27

51R

ESET

52

VSW

53G

ND

54VD

DC

OR

E

55VD

DIN

56PA

3057

PA31

58PB

3059

PB31

60PB

0061

PB01

62PB

0263

PB03

64

DIGITAL PINANALOG PINOSCILLATORGROUNDINPUT SUPPLY REGULATED INPUT/OUTPUT SUPPLYRESET PIN



5.2 SAM L21J WLCSP64

8 7 6 5 4 3 2 1

BC

DEFGHJKL

A

MNPQR

PB03PA03VDDANAPB08

PA01GNDANAPB07PA05

PB01PA02PB06PA04

PA00PA06PB09PA08

PB31PB04PA07PA09

PB30PB05PA10PA11

PA30PB00PB11GND

VDDINPB10 VDDIO PB02

GNDPA31PB12PB14

VSWPB17PB15PB13

VDDCOREPB23VDDIOPA13

PA27PA21GNDPA12RESETPA24PA19PA14

GNDPA23PA18PA15

PB22PA25PA20PA17

VDDIOPA22PB16PA16

REGULATED INPUT/OUPUT SUPPLY



5.3 SAM L21G

PA21

PA00 1PA01 2PA02 3PA03 4

GNDANA 5VDDANA 6

PB08 7PB09 8PA04 9PA05 10PA06 11PA07 12

PA08

13PA

0914

PA10

15PA

1116

VDD

IO17

GN

D18

PB10

19PB

1120

PA12

21PA

1322

PA14

23PA

1524

VDDIO36GND35PA2534PA2433PA2332PA2231

30PA2029PA1928PA1827PA1726PA1625

PB22

37PB

2338

PA27

39R

ESET

40

VSW

41G

ND

42VD

DC

OR

E

43VD

DIN

44PA

3045

PA31

46PB

0247

PB03

48

DIGITAL PINANALOG PINOSCILLATORGROUNDINPUT SUPPLYREGULATED INPUT/OUTPUT SUPPLYRESET PIN



5.4 SAM L21E

PA00 1PA01 2PA02 3PA03 4PA04 5PA05 6PA06 7PA07 8

VDD

ANA

9G

ND

10PA

0811

PA09

12PA

1013

PA11

14PA

1415

PA15

16

PA2524PA2423PA2322PA2221PA1920PA1819PA1718PA1617

PA27

25R

ESET

26

VSW

27G

ND

28VD

DC

OR

E

29VD

DIN

30PA

3031

PA31

32

DIGITAL PINANALOG PINOSCILLATORGROUNDINPUT SUPPLYREGULATED INPUT/OUTPUT SUPPLYRESET PIN



6. Signal Descriptions ListThe following table gives details on signal names classified by peripheral.

Table 6-1.Signal Descriptions List

Signal Name Function Type Active Level

Analog Comparators - AC

AIN[3:0] AC Analog Inputs Analog

CMP[1:0] AC Comparator Outputs Digital

Analog Digital Converter - ADC

AIN[19:0] ADC Analog Inputs Analog

VREFA ADC Voltage External ReferenceA

Analog

VREFB ADC Voltage External ReferenceB

Analog

Digital Analog Converter - DAC

VOUT[1:0] DAC Voltage output Analog

VREFA DAC Voltage External Reference Analog

Operational Amplifier - OPAMP

OANEG[2:0] OPAMP Analog Negative Inputs Analog

OAPOS[2:0] OPAMP Analog Positive Inputs Analog

OAOUT[2:0] OPAMP Analog outputs Analog

External Interrupt Controller - EIC

EXTINT[15:0] External Interrupts inputs Digital

NMI External Non-Maskable Interruptinput

Digital

Reset Controller - RSTC

EXTWAKE[7:0] External wake-up inputs Digital

Generic Clock Generator - GCLK

GCLK_IO[7:0] Generic Clock (source clockinputs or generic clock generatoroutput)

Digital

Custom Control Logic - CCL

IN[11:0] Logic Inputs Digital

OUT[3:0] Logic Outputs Digital

Supply Controller - SUPC

VBAT External battery supply Inputs Analog



Signal Name Function Type Active Level

PSOK Main Power Supply OK input Digital

OUT[1:0] Logic Outputs Digital

Power Manager - PM

RESETN Reset input Digital Low

Serial Communication Interface - SERCOMx

PAD[3:0] SERCOM Inputs/Outputs Pads Digital

Oscillators Control - OSCCTRL

XIN Crystal or external clock Input Analog/Digital

XOUT Crystal Output Analog

32KHz Oscillators Control - OSC32KCTRL

XIN32 32KHz Crystal or external clockInput

Analog/Digital

XOUT32 32KHz Crystal Output Analog

Timer Counter - TCx

WO[1:0] Waveform Outputs Digital

Timer Counter - TCCx

WO[7:0] Waveform Outputs Digital

Peripheral Touch Controller - PTC

X[15:0] PTC Input Analog

Y[15:0] PTC Input Analog

General Purpose I/O - PORT

PA25 - PA00 Parallel I/O Controller I/O Port A Digital

PA27 Parallel I/O Controller I/O Port A Digital

PA31 - PA30 Parallel I/O Controller I/O Port A Digital

PB17 - PB00 Parallel I/O Controller I/O Port B Digital



Universal Serial Bus - USB

DP DP for USB Digital

DM DM for USB Digital

SOF 1kHz USB Start of Frame Digital



7. I/O Multiplexing and Considerations

7.1 Multiplexed SignalsEach pin is by default controlled by the PORT as a general purpose I/O and alternatively it can beassigned to one of the peripheral functions A, B, C, D, E, F, G, H or I. To enable a peripheral function on apin, the Peripheral Multiplexer Enable bit in the Pin Configuration register corresponding to that pin(PINCFGn.PMUXEN, n = 0..31) in the PORT must be written to '1'. The selection of peripheral function Ato H is done by writing to the Peripheral Multiplexing Odd and Even bits in the Peripheral Multiplexingregister (PMUXn.PMUXE/O) in the PORT.

This table describes the peripheral signals multiplexed to the PORT I/O pins.

Table 7-1.PORT Function MultiplexingPin I/O

pinSupply A B(1)(2) C D E F G H I

SAML21E SAML21G SAML21J EIC/RSTC REF ADC AC PTC DAC OPAMP SERCOM (1)(2)

SERCOM-ALT

TC/TCC (3)

TCC COM AC/GCLK/SUPC

CCL

1 1 1 PA00 VSWOUT EXTINT[0]/EXTWAKE[0]

SERCOM1/PAD[0]

TCC2/WO[0]

2 2 2 PA01 VSWOUT EXTINT[1]/EXTWAKE[1]

SERCOM1/PAD[1]

TCC2/WO[1]

3 3 3 PA02(5)

VDDANA EXTINT[2]/EXTWAKE[2]

AIN[0] Y[0] VOUT[0] OA_NEG[0]

4 4 4 PA03 VDDANA EXTINT[3]/EXTWAKE[3]

VREFA AIN[1] Y[1]

5 PB04 VDDANA EXTINT[4] AIN[12] Y[10]

6 PB05 VDDANA EXTINT[5] AIN[13] Y[11] OA_NEG[1]

9 PB06 VDDANA EXTINT[6] AIN[14] Y[12] OA_NEG[2] CCL2IN[0]

10 PB07 VDDANA EXTINT[7] AIN[15] Y[13] CCL2IN[1]

7 11 PB08(5)

VDDANA EXTINT[8] AIN[2] OA_OUT[1] SERCOM4/PAD[0]

TC0/WO[0]

CCL2IN[2]

8 12 PB09 VDDANA EXTINT[9] AIN[3] Y[15] OA_POS[1] SERCOM4/PAD[1]

TC0/WO[1]

CCL2OUT

5 9 13 PA04(5)


VREFB AIN[4] AIN[0] OA_OUT[2] SERCOM0/PAD[0]

TCC0/WO[0]

CCL0IN[0]

6 10 14 PA05(5)


AIN[5] AIN[1] VOUT[1] OA_POS[2] SERCOM0/PAD[1]

TCC0/WO[1]

CCL0IN[1]

7 11 15 PA06 VDDANA EXTINT[6]/EXTWAKE[6]

AIN[6] AIN[2] Y[4] OA_POS[0] SERCOM0/PAD[2]

TCC1/WO[0]

CCL0IN[2]

8 12 16 PA07(5)


AIN[7] AIN[3] OA_OUT[0] SERCOM0/PAD[3]

TCC1/WO[1]

CCL0OUT

11 13 17 PA08(5)

VDDIO(6) NMI AIN[16] X[0]

Y[6]

SERCOM0/PAD[0]

SERCOM2/PAD[0]

TCC0/WO[0]

TCC1/WO[2]

CCL1IN[0]

12 14 18 PA09 VDDIO(6) EXTINT[9] AIN[17] X[1]

Y[7]

SERCOM0/PAD[1]

SERCOM2/PAD[1]

TCC0/WO[1]

TCC1/WO[3]

CCL1IN[1]


Y[8]

SERCOM0/PAD[2]

SERCOM2/PAD[2]

TCC1/WO[0]

TCC0/WO[2]

GCLK_IO[4] CCL1IN[2]


Y[9]

SERCOM0/PAD[3]

SERCOM2/PAD[3]

TCC1/WO[1]

TCC0/WO[3]

GCLK_IO[5] CCL1OUT

19 23 PB10 VDDIO EXTINT[10] Y[2] SERCOM4/PAD[2]

TC1/WO[0]

TCC0/WO[4]


20 24 PB11 VDDIO EXTINT[11] Y[3] SERCOM4/PAD[3]

TC1/WO[1]

TCC0/WO[5]

GCLK_IO[5] CCL1OUT

25 PB12 VDDIO EXTINT[12] X[12]Y[5]

SERCOM4/PAD[0

TC0/WO[0]

TCC0/WO[6]

GCLK_IO[6]

26 PB13 VDDIO EXTINT[13] X[13]Y[14]

SERCOM4/PAD[1]

TC0/WO[1]

TCC0/WO[7]

GCLK_IO[7]



Pin I/Opin

Supply A B(1)(2) C D E F G H I

SAML21E SAML21G SAML21J EIC/RSTC REF ADC AC PTC DAC OPAMP SERCOM (1)(2)

SERCOM-ALT

TC/TCC (3)

TCC COM AC/GCLK/SUPC

CCL

27 PB14 VDDIO EXTINT[14] X[14] SERCOM4/PAD[2]

TC1/WO[0]


28 PB15 VDDIO EXTINT[15] X[15] SERCOM4/PAD[3]

TC1/WO[1]


21 29 PA12 VDDIO EXTINT[12] SERCOM2/PAD[0]

SERCOM4/PAD[0]

TCC2/WO[0]

TCC0/WO[6]

AC/CMP[0]

22 30 PA13 VDDIO EXTINT[13] SERCOM2/PAD[1]

SERCOM4/PAD[1]

TCC2/WO[1]

TCC0/WO[7]

AC/CMP[1]

15 23 31 PA14 VDDIO(6) EXTINT[14] SERCOM2/PAD[2]

SERCOM4/PAD[2]

TC4/WO[0]

TCC0/WO[4]

GCLK_IO[0]


SERCOM4/PAD[3]

TC4/WO[1]

TCC0/WO[5]

GCLK_IO[1]

17 25 35 PA16 VDDIO(6) EXTINT[0] X[4] SERCOM1/PAD[0]

SERCOM3/PAD[0]

TCC2/WO[0]

TCC0/WO[6]



SERCOM3/PAD[1]

TCC2/WO[1]

TCC0/WO[7]



SERCOM3/PAD[2]

TC4/WO[0]

TCC0/WO[2]

AC/CMP[0] CCL0IN[2]


SERCOM3/PAD[3]

TC4/WO[1]

TCC0/WO[3]

AC/CMP[1] CCL0OUT

39 PB16 VDDIO EXTINT[0] SERCOM5/PAD[0]

TC2/WO[0]

TCC0/WO[4]


40 PB17 VDDIO EXTINT[1] SERCOM5/PAD[1]

TC2/WO[1]

TCC0/WO[5]

GCLK_IO[3] CCL3OUT

29 41 PA20 VDDIO EXTINT[4] X[8] SERCOM5/PAD[2]

SERCOM3/PAD[2]

TC3/WO[0]

TCC0/WO[6]

GCLK_IO[4]

30 42 PA21 VDDIO EXTINT[5] X[9] SERCOM5/PAD[3]

SERCOM3/PAD[3]

TC3/WO[1]

TCC0/WO[7]

GCLK_IO[5]


SERCOM5/PAD[0]

TC0/WO[0]

TCC0/WO[4]



SERCOM5/PAD[1]

TC0/WO[1]

TCC0/WO[5]

USB/SOF1kHz



SERCOM5/PAD[2]

TC1/WO[0]

TCC1/WO[2]

USB/DM CCL2IN[2]


SERCOM5/PAD[3]

TC1/WO[1]

TCC1/WO[3]

USB/DP CCL2OUT

37 49 PB22 VDDIN EXTINT[6] SERCOM5/PAD[2]

TC3/WO

sam l21 family data sheet - microchip...

Documents