This part is a kind of semiconductor called AT89S8252-24PI.

Function of this product has 8-Bit Microcontroller with 8K Bytes Flash.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • Compatible with MCS-51™ Products • 8K Bytes of In-System Reprogrammable Downloadable Flash Memory • • • • • • • • • • • • • • • – SPI Serial Interface for Program Downloading – Endurance: 1,000 Write/Erase Cycles 2K Bytes EEPROM – Endurance: 100,000 Write/Erase Cycles 4.0V to 6V Operating Range Fully Static Operation: 0 Hz to 24 MHz Three-Level Program Memory Lock 256 x 8-bit Internal RAM 32 Programmable I/O Lines Three 16-bit Timer/Counters Nine Interrupt Sources Programmable UART Serial Channel SPI Serial Interface Low Power Idle and Power Down Modes Interrupt Recovery From Power Down Programmable Watchdog Timer Dual Data Pointer Power Off Flag 8-Bit Microcontroller with 8K Bytes Flash AT89S8252 Description The AT89S8252 is a low-pow [ ... ]

AT89S8252-24PI PDF Datasheet Download