With this board you can develop and prototype any circuit with any of 8051/8052 (40 pin microcontrollers) i.e Atmel's AT89C51, AT89C52, AT89S51, AT89S52, AT89S53 and Phillips 89v51RD2 . The RS232 driver on board allows easy connection with PC or other embedded hardware . The board have User buttons and status LEDs. The bridge rectifier allow this board to be powered with both AC and DC power supply adapters. MAIN FEATURES: RS232 Tx, Rx interface with MAX232 IC on socket DIL40 microcontroller socket - To Reduce Microcontroller Damages Quartz crystal 11.0592Mhz Reset button Power plug-in jack Extension slot on every uC pin GND bus Vcc bus. Four mounting holes 3,3 mm (0,13") I/O Features ISP Programming Supported (Usbasp Programmer Supported) 89v51RD2 Flasher through RS232 using Flash magic Software On board Regulated Power Supply 5v,12v supplies Easy to test with Burg Connectors wires An RS232 Serial Port DC Power Supply Connector (12v Ac or Dc) 4 LED array 2 Interrupt Switches 8051/8052/AVR USBASP PROGRAMMER Features Flash Burner for AVR Series from ATMEL and 8051/8052 Microcontrollers. Communication - USB Auto Erase before writing and Auto Verify after writing Freeware AVR GCC C Compiler ISP Programming Socket Connects through AVR DUDE USB Powered Device Support AT89s51, AT89s52, AT89s53, AT89s8253 Supports ALL AVR Series Microcontroller Programming Package Content 8051 / 8052 Development Board with AT89S52 , MAX232 IC and 8051/8052/AVR USBASP PROGRAMMER 8051/8052/AVR USBASP PROGRAMMER FREE USB CABLE FREE 6 Burg Cable Female 2 Female