AVR-MT128 development board Users Manual Rev.
INTRODUCTION: AVR-MT128 is simple but powerful board which uses the MCU ATMega128 from Atmel. With its LCD, buttons, relay and variety of interfaces such as RS232 (in two variants – 4 pins and DB9), JTAG, ISCP, Dallas, etc. this board is suitable for different embedded systems applications.
Software: AVR Studio + WinAVR – free C compiler and debugger can be downloaded at avrfreaks.org web site. IAR IW for AVR is a commercial software for development of embedded systems software.
Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Powerdown, Standby, and Extended Standby o Software Selectable Clock Frequency o ATmega103 Compatibility Mode Selected by a Fuse o Global Pull-up Disable I/O and Packages o 53 Programmable I/O Lines o 64-lead TQFP and 64-pad MLF Operating Voltages o 4.5 - 5.
MEMORY MAP: BOARD LAYOUT:
SCHEMATIC: +12V C2 100n R9 4.7K 220uF/25VDC C3 R2 22K 100uF R3 22K B1 AVR-MT-128 B1 COPYRIGHT(C) 2008, OLIMEX LTD HTTP://WWW.OLIMEX.
POWER SUPPLY CIRCUIT: The power supply of AVR-MT128 is taken from Power jack connector. You should apply 9 VAC or +12 VDC at the positive central pin. The consumption of the board is about 30 mA. RESET CIRCUIT: AVR-MT128 reset circuit is made with ZM33064 with typical threshold 4.5V. When the voltage falls bellow that minimum, the MSU resets. CLOCK CIRCUIT: Quartz crystal 16MHz for maximum performance is connected to ATMega128 pin 23 (XTAL2) and pin 24 (XTAL1).
CONNECTOR DESCRIPTIONS: JTAG: Pin # Signal Name 1 TCK 2 GND 3 TDO 4 +5V 5 TMS 6 RESET 7 +5V 8 NC 9 TDI 10 GND This connector allows programming and debugging via AVR-JTAG or other compatible tools. TDI Input Test Data In. This is the serial data input for the shift register. TDO OutputTest Data Out. This is the serial data output for the shift register. Data is shifted out of the device on the negative edge of the TCK signal. TMS Input Test Mode Select.
7 SCK 8 GND 9 PDO 10 GND This connector allows programming via AVR-PG1, AVR-PG2 or other compatible tool. PDI PDO SCK Input Program Data In. This pin is serial data input for the MCU. OutputProgram Data Out. This pin is serial data output from the MCU. I/O Serial (Synchronization) Clock. This is the synchronization signal. DB9-RS232: Pin # Signal Name 1 NC 2 TXD 3 RXD 4 NC 5 GND 6 NC 7 NC 8 NC 9 NC TXD OutputTransmit Data.
4 +5V RELAY_CONNECTOR: This connector provides the user with access to the contact plates of the relay. FREQ: Pin # Signal Name 1 FREQ 2 GND External input frequency is applied at pin 1. DALLAS: Pin # Signal Name 1 DALLAS 2 GND Signal from Dallas chips is applied at pin 1 of the Dallas interface.
ADC: Pin # Signal Name 1 AREF 2 GND 3 ADC0 4 ADC1 5 ADC2 6 ADC3 Some of the Analog to Digital Converter signals are grouped into an extension.
EXT2: Pin # Signal Name 1 GND 2 +5V 3 PG0/WR 4 PG1/RD 5 PG2/ALE 6 SS 7 MOSI 8 MISO 9 OC0 10 OC1A 11 OC1B 12 OC2/OC1C 13 PC3/A11 14 PA7/AD7 PWR: Pin # Signal Name 1 PWR 2 GND You should apply 9 VAC or +12VDC on pin 1.
MECHANICAL DIMENSIONS: All measures are in mm. AVAILABLE DEMO SOFTWARE: Check for available demo software for AVR-MT128 on our website: www.olimex.com/dev.
ORDER CODE: AVR-MT128 – 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. All boards produced by Olimex are ROHS compliant Revision history: REV.
Disclaimer: © 2008 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.
