Tag Archives: 89Sxx

89Sxx Development Board


There are some 89Sxx development board, here is another one. I have designed this single side development board to be used as a tool for learning MCS-51 Microcontrollers, and for easy microcontroller project development.

The 89Sxx development board features :

  • 89Sxx 40-DIL based design, 89S51/52/53
  • In System Programming (ISP) through the 6-pin header
  • RS-232 and RS-485 serial port (shared pin) for communicating with serial devices like PC
  • HD44780 compatible alphanumeric LCD connectivity with backlight control
  • 4 on-board tact switch
  • 16 general purpose IO port pins on 5×2 header (Port0 and Port2)
  • 24Cxx I2C EEPROM
  • DS1302 serial Real Time Clock (RTC) with battery backup
  • On-board supply rectifier and voltage regulator
  • Single sided PCB design

89Sxx Development Board – [Link]