Introduction
This document describes the AT89STK-11 board dedicated to the standard C51 microcontrollers with in-system programming.
All of the microcontroller I/Os are made available in an expansion area with prototyping facilities.

FEATUREs
■ Stand-alone Board
■ In-System Programmable (ISP) including ‘Auto ISP’ feature
■ On-board Voltage Regulator
■ Microcontroler on its sockets
   – PLCC44-pin package
■ On-board 3V or 5V power supply circuitry
   – from an external power connector
   – from an external battery
■ On-board RESET
■ Leds : Power, ALE, RS232 Rx and Tx
■ External MCU clock connector
■ External PCA clock connector
■ TWI, SPI and RS232 connectors
■ INT0 & INT1 Push-button
■ Expansion area with prototyping facilities
■ Commercial Temperature Range: 0 to +70°C Operating Temperature
■ Dimension: 95 mm x 120 mm