The STK128+ is a complete, cost-effective development board for the ATmega128. It is designed to give designers a quick start to develop code on ATmega128 MCU and makes them develope prototype device easily.

The ATmega128 chip is mounted on a device board, which can be separated from the mother board. Hence, easily changing MCU is supported. The ATmega128 chip is in TQFP64 package and will randomly be ATmega128-16AU or ATmega128L-8AU or ATmega128A-AU.

The STK128+ Standard package comes with an ATmega128 device board, while the STK128+ Premium package comes with the standard package, an additional spare ATmega128 device board, and an Experiment Fittings Pack.

• Power
  • Powered from external 5V power supply
  • Jumper for configuring voltage level to be applied, 5V/3.3V
• Onboard Chips
  • ATmega128 (TQFP64), MCU, mounted on the device board
  • AMS1117-3.3, on board regulator
  • MAX3232, True RS232 Transceivers
• Interfaces
  • Two RS232 connector for UART0 and UART1, DB9 standard
    • Guaranteed to operate under 3V level supply thanks to the MAX3232
    • UART0 and UART1 jumpers, short the jumper to connect UART to AVR MCU, open the jumper to vacate the I/O ports.
  • 6-pin / 10-pin ISP port
  • JTAG port
• Human to Machine Interface
  • RESET button, used to reset the MCU
  • Power indicator LED
  • 8 surface mounted LEDs, can be used as I/O status indicator
  • 8 Push-buttons, for analog input
• Other Features
  • Crystal configurable, there is a jumper for selecting on board 7.3728M crystal or external crystal mounted via the socket
  • All the MCU pins are accessible on expansion connectors for further expansion
  • All the pins are marked on the board. These marks describe the function of each pin
  • Compatible with several AVR MCUs:
    • Fully compatible with: ATmega64/ATmega128
    • Partly compatible with: ATmega1281/ATmega2561, AT90CAN32/AT90CAN64/AT90CAN128