OpenM128 is an AVR development board that features a ATmega128 device as the microcontroller. It supports further expansion with various optional accessory boards for specific application. The modular and open design makes it the ideal for starting application development with AVR microcontroller.
What's On Board
ATmega128A-AU: the high performance AVR MCU which features:
Core: AVR 8-bit RISC
Operating Frequency: 16MHz Max
Operating Voltage: 2.7-5.5V
Memories: 128kB Flash, 4kB SRAM, 4kB EEPROM
Communication Interfaces: 1 x SPI, 1 x TWI (I2C), 2 x USART, 8 x PWM, 8 x ADC
AMS1117-3.3: 3.3V voltage regulator
LEDs: convenient for indicating I/O status and/or program running state
User keys: for I/O input test and/or program control
Joystick: five positions
Crystal oscillator: 7.3728M & 32.768K
Adjustable resistor: for LCD12864 contrast adjustment
16 I/Os interface: for connecting accessory boards which using I/O control, such as FT245 USB FIFO, 8 SEG LED, etc.
8 I/Os interface | 8-bit AD interface
for connecting accessory boards which using I/O control, such as 8 Push Buttons, Motor, etc.
there's also 8-bit AD interface can be used for AD testing
6 I/Os interface | USART0+AC+PWM3 interface
for connecting USART peripherals, such as RS232, RS485, USB TO UART, etc.
for connecting accessory boards which using PWM interface, also supports analog comparison through AC interface
for connecting SPI peripherals, such as DataFlash (AT45DBxx), SD card, MP3, etc. the SPI interface includes additional I/O pins (PWM, T/C as regular I/O) which can be used as controlling pins
for connecting accessory boards which using PWM interface, also supports frequency calculation through T/C interface
for connecting I2C peripherals, such as I/O expander (PCF8574), EEPROM (AT24Cxx), etc. the I2C interface includes additional I/O pins (PWM as regular I/O) which can be used as controlling pins
for connecting accessory boards which using PWM interface
USART1 interface: for connecting USART peripherals, such as RS232, RS485, USB TO UART, etc.
1-WIRE interface: for connecting 1-WIRE devices (TO-92 package), such as temperature sensor (DS18B20), electronic registration number (DS2401), etc.
PS/2 interface: for connecting PS/2 keyboard and/or mouse
Graphic multi-color LCD interface: for connecting 2.2 inch multi-color touch screen LCD which using SPI control
Graphic dot matrix LCD interface: for connecting dot matrix LCD, such as LCD12864 (3.3V blue backlight)
5V DC jack
Custom crystal socket
VCC power input/output: usually used for power supply output, and/or common ground with other application board
MCU pins connector: all the MCU pins are accessible on expansion connectors for further expansion
ISP6 interface: for programming
ISP10 interface: for programming
JTAG interface: for programming/debugging
User keys jumper
LCD selection jumper
short the jumper to use dot matrix LCD
open the jumper to use multi-color LCD
VCC selection jumper
Crystal selection jumper
For jumper 28-31:
short the jumper to connect to I/Os used in example code;
open the jumper to connect to other custom pins via jumper wires.