TMX320-P28027 development board Users Manual

All boards produced by Olimex are RoHS compliant

Rev.A, October 2009Copyright(c) 2009, OLIMEX Ltd, All rights reserved

Page 1

INTRODUCTION

TMX320-P28027 is development board with TMS320F28027 microcontroller from Texas Instruments. The board have everything necessary to build simple applications: Reset circuit, trimmer potentiometer, clock circuit, USB, JTAG, user button, most of the GPIOs are on prototype area and extension headers, where you can connect your additional circuits. The board have very competitive pricing and is very good for people who want to learn DSPs.

BOARD FEATURES

- MCU: TMS320F28027 32KB Flash, 6 KB SARAM, 4.6 MSPS 12Bit ADC, SPI, RS232, I2C;

- JTAG connector;

- USB-to-RS232 convertor allow easy to power board and to connect to notebooks and decent computers without RS232 port;

- UEXT connector for connection to other Olimex modules as MOD-NRF24Lx, MOD-MP3, etc.;

- MOTOR control connector (for add on modules with ADC, PWM, Interrupt signals available);

- User button;

- Trimmer potentiometer connected to Analog input;

- power supply LED;

- user status LED;

- RST button;

- external power supply jack for AC or DC power supply;

- Voltage regulator + power supply filtering capacitor;

- prototype area with 0.1" step, Vcc + GND bus;

- PCB: FR-4, 1.5 mm (0,062"), green soldermask, white silkscreen component print;

- Dimensions: 140x100 mm (5.5x3.9").

ELECTROSTATIC WARNING

The TMX320-P28027 development board is shipped in protective anti-static packaging. The board must not be subject to high electrostatic potentials. General practice for working with static sensitive devices should be applied when working with this board.

BOARD USE REQUIREMENTS

Cables: Depends on the Programmers/Debuggers you use. If you use TMS320-JTAG, you will need LPT cable, if you use TMS320-JTAG-USB, you will need 1.8 meter USB A-B cable.

Page 2

Hardware: Power supply adapter 4.5-6VAC or 6-9VDC (if the board is notpowered from USB host).

TMS320-JTAG, or TMS320-JTAG-USB for programming and debugging or similar tool.

NOTE: When you use TMS320-JTAG-USB, switch off USB cable from TMX320-P28027 and power supply the board from PWR Jack connector (6-9VDC).

Software: Texas Instruments Code Composer Studio 3.30 and drivers-available on the www.ti.com

PROCESSOR FEATURES

The TMS320F28027 processor has the following features:

● High-Efficiency 32-Bit CPU (TMS320C28x™)

▬ 60 MHz (16.67-ns Cycle Time)

▬ 40 MHz (25-ns Cycle Time)

▬ 16 x 16 and 32 x 32 MAC Operations

▬ 16 x 16 Dual MAC

▬ Harvard Bus Architecture

▬ Atomic Operations

▬ Fast Interrupt Response and Processing

▬ Unified Memory Programming Model

▬ Code-Efficient (in C/C++ and Assembly)

● Low Device and System Cost:

▬ Single 3.3-V Supply

▬ No Power Sequencing Requirement

▬ Integrated Power-on Reset and Brown-out Reset

▬ Small Packaging, as Low as 38-Pin Available

▬ Low Power

▬ No Analog Support Pins

● Clocking:

▬ 2 Internal Zero-pin Oscillators

▬ On-chip Crystal Oscillator/External Clock Input

▬ Dynamic PLL Ratio Changes Supported

▬ Watchdog Timer Module

▬ Missing Clock Detection Circuitry

● Up to 22 Individually Programmable Multiplexed GPIO Pins With Input Filtering

Page 3

● Peripheral Interrupt Expansion (PIE) Block That Supports All Peripheral Interrupts

● Three 32-Bit CPU Timers

● Independent 16-bit Timer in Each ePWM Module

● On-Chip Memory

▬ On-chip FLASH (16-bit word) – 32K

▬ On-Chip SARAM (16-bit word) – 6K

▬ OTP, Boot ROM Available

● 128-Bit Security Key/Lock

▬ Protects Secure Memory Blocks

▬ Prevents Firmware Reverse Engineering

● Serial Port Peripherals

▬ One SCI (UART) Module

▬ One SPI Module

▬ One Inter-Integrated-Circuit (I2C) Bus

● Advanced Emulation Features

▬ Analysis and Breakpoint Functions

▬ Real-Time Debug via Hardware

● Enhanced Control Peripherals

▬ Enhanced Pulse Width Modulator (ePWM)

▬ High-resolution PWM (HRPWM)

▬ Enhanced Capture (eCAP)

▬ Analog-to-Digital Converter (ADC)

▬ On-Chip Temperature Sensor

▬ Comparator

● Package

▬ 48-Pin PT Plastic Quad Flatpack (PQFP)

Page 4

BLOCK DIAGRAM

Page 5

MEMORY MAP

Page 6

SCHEMATIC

Page 7

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BOARD LAYOUT

Page 8

POWER SUPPLY CIRCUIT

TMX320-P28027 board can take power from POWER connector (4.5-6VAC or 6-9VDC), from VIN on the prototype area (5-9VDC), from MOTOR connector pin 4 (5-9VDC) and from USB connector.

The board power consumption is around 90mA with all peripherals and MCU running at full speed.

RESET CIRCUIT

Reset circuit includes R11 (10k), R12 (100 Ohm) and TMS320F28027 pin 3 (XRS).Although on the schematic is made provision for external reset by the RST button.

CLOCK CIRCUIT

Quartz crystal 20Mhz is connected to TMS320F28027 pin 45 (X1) and pin 46 (X2).

JUMPER DESCRIPTION

The jumpers TDO, GPIO34 and #TRST selects boot mode source. The table bellow shows boot mode variants.

BOOT SELECT TDO GPIO34 #TRST

GET MODE 1 1 0

WAIT 1 0 0

SCI 0 1 0

I2C 1 0 0

PARALLEL I/O 0 0 0

EMULATION BOOT X X 1

GPIO34

1 0#TRST

Default state: GET MODE

1 0TDO

1 0

3.3VA_REFConnects VREFHI to analog 3.3 V. Default state is closed.

3.3V_REF

Page 9

Gives user opportunity to connect VREFHI to external 3.3V power source.Default state is open.

INPUT/OUTPUT

Reset button with name RST – connected to TMS320F28027 pin 3 (XRS).

User button with name BUT – connected to TMS320F28027 pin 29 (GPIO0/EPWM1A).

Status LED (green) with name STAT – connected to TMS320F28027 pin 4 (ADCINA6).

Trimmer potentiometer with name AN_TR – connected to TMS320F28027 pin 18 ADCINB7.

Power supply LED (red ) with name PWR – indicates that 3.3V is present.

EXTERNAL CONNECTOR DESCRIPTION

PWR:

Pin # Signal Name

1 From 4.5 to 6VAC or from 6 to 9VDC

2 GND

USB:The USB is made with USB to serial converter chip FT232RL of FTDI.

RXD and TXD pins of the converter is connected to SCI_A module of TMS320F28027 respective to GPIO28/SCIRXDA (pin 48) and GPIO29/SCITXDA (pin 1)

Pin # Signal Name

1 +5V

2 USBDM

3 USBDP

4 GND

UEXT:

Pin # Signal Name Pin # Signal Name

1 3.3V 2 GND

3 GPIO12/TXDA 4 EPWM4B/RXDA

Page 10

5 SCLA/EPWMSYNCO 6 SDAA/#ADCSOCA0

7 SPISOMIA 8 SPISIMOA

9 SPICLKA 10 #SPISTEA

UEXT is a universal connector which Olimex uses on it's development boards to attach different “modules” on the connector there are 3.3V power supply and UART, SPI and I2C interface. Olimex have range of modules like MOD-MP3, MOD-nRF24Lx, MOD-RFID125, MOD-NOKIA6610 and many others to come.

JTAG:

TI standard 2x7 pin JTAG connector

Pin # Signal Name Pin # Signal Name

1 TMS 2 #TRST

3 TDI 4 GND

5 3.3V 6 Removed

7 TDO 8 GND

9 TCK 10 GND

11 TCK 12 GND

13 EMU0 14 EMU1

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MOTOR CONTROL CONNECTOR:

MOTOR control connector provides signals for add on modules with ADC, PWM, Interrupt signals available on it.

Pin # Signal Name Pin # Signal Name

1 3.3V 2 GND

3 +5V 4 VIN

5 BUT/EPWM1A 6 EPWM1B

7 EPWM2A 8 EPWM1B

9 EPWM3A 10 EPWM3B

11 EPWM4A 12 EPWM4B/RXDA

13 GPIO12/TXDA 14 NC

15 SPICLKA 16 #SPISTEA

17 SPISIMOA 18 SPISOMIA

19 AIO12 20 AIO10

21 SCLA/EPWMSYNCO 22 GPIO34

23 ADCINA6 24 ADCINA7

25 ADCINA4 26 ADCINB3

27 ADCINA2 28 ADCINA3

29 ADCINB1 30 ADCINA1

31 VREFHI 32 SDAA/#ADCSOCA0

33 3.3VA 34 GNDA

Page 12

PROTO AREA:

Pin # Signal Name Pin # Signal Name Pin # Signal Name

AGND AGND A1 ADCINA1 6 EPWM4A

3.3VA V+ A0 VREFHI 5 EPWM3B

B7 ADC_TRIM 34 GPIO34 4 EPWM3A

B6 USB_CONNECT 33 SCLA/EPWMSYNCO 3 EPWM2B

B4 AIO12 32 SDAA/#ADCSOCA0 2 EPWM2A

B3 ADCINB3 29 TXDA 1 EPWM1B

B2 AIO10 28 RXDA 0 BUT/EPWM1A

B1 ADCINB1 19 #SPISTEA 1.8V VDD1

A7 ADCINA7 18 SPICLKA XRS XRS

A6 ADCINA6 17 SPISOMIA VIN VIN

A4 ADCINA4 16 SPISIMOA +5V +5V

A3 ADCINA3 12 GPIO12/TXDA 3.3V VCC

A2 ADCINA2 7 EPWM4B/RXDA GND GND

Page 13

SPIThe SPI is a high-speed, synchronous serial I/O port that allows a serial bit stream of programmed length (one to sixteen bits) to be shifted into and out of the device at a programmable bit-transfer rate. Normally, the SPI is used for communications between the MCU and external peripherals or another processor. Typical applications include external I/O or peripheral expansion through devices such as shift registers, display drivers, and ADCs. Multi-device communications are supported by the master/slave operation of the SPI. The SPI contains a 4-level receive and transmit FIFO for reducing interrupt servicing overhead.

SCIThe serial communications interface is a two-wire asynchronous serial port, commonly known as UART. The SCI contains a 4-level receive and transmit FIFO for reducing interrupt servicing overhead.

I2CThe inter-integrated circuit (I2C) module provides an interface between a MCU and other devices compliant with Philips Semiconductors Inter-IC bus (I2C-bus) specification version 2.1 and connected by way of an I2C-bus. External components attached to this 2-wire serial bus can transmit/receive up to 8-bit data to/from the MCU through the I2C module. The I2C contains a 4-level receive and transmit FIFO for reducing interrupt servicing overhead.

Page 14

MECHANICAL DIMENSIONS:

Page 15

AVAILABLE DEMO SOFTWARE:

DEMO1. Blink LED C Source and CCS 3.3 project files

Blinks the on-board LED.

Page 16

ORDER CODE:

TMX320-P28027 – assembled and tested (no kit, no soldering required)

How to order? You can order to us directly or by any of our distributors. Check our web www.olimex.com/dev for more info.

Revision history:

REV.A create October 2009

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Disclaimer:

© 2009 Olimex Ltd. All rights reserved. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd. Other terms and product names may be trademarks of others.

The information in this document is provided in connection with Olimex products. No license, express or implied or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Olimex products.

Neither the whole nor any part of the information contained in or the product described in this document may be adapted or reproduced in any material from except with the prior written permission of the copyright holder.

The product described in this document is subject to continuous development and improvements. All particulars of the product and its use contained in this document are given by OLIMEX in good faith. However all warranties implied or expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded.

This document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss or damage arising from the use of any information in this document or any error or omission in such information or any incorrect use of the product.

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