This part is a kind of semiconductor called 89C51ED2.

Function of this product has AT89C51ED2.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

AT89C51RD2 / AT89C51ED2 QualPack Qualification Package AT89C51ED2 FLASH 8-bit C51 Microcontroller 64 Kbytes FLASH, 2 Kbytes EEPROM AT89C51RD2 / AT89C51ED2 JULY 2003 Rev. 0 – 2003 July 1 AT89C51RD2 / AT89C51ED2 QualPack 1 Table of contents 1 2 3 TABLE OF CONTENTS. 2 GENERAL INFORMATION.. 3 TECHNOLOGY INFORMATION 4 3.1 WAFER PROCESS TECHNOLOGY [ ... ]

89C51ED2 PDF Datasheet Download