This part is a kind of semiconductor called AT89C5131A-M.

Function of this product has 8-bit Flash Microcontroller.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • 80C52X2 Core (6 Clocks per Instruction) – Maximum Core Frequency 48 MHz in X1 Mode, 24 MHz in X2 Mode – Dual Data Pointer – Full-duplex Enhanced UART (EUART) – Three 16-bit Timer/Counters: T0, T1 and T2 – 256 Bytes of Scratchpad RAM • 16/32-Kbyte On-chip Flash EEPROM In-System Programming through USB – Byte and Page (128 bytes) Erase and Write – 100k Write Cycles • 3-KbyteFlash EEPROM for Bootloader – Byte and Page (128 bytes) Erase and Write – 100k Write Cycles • 1-Kbyte EEPROM Data ( – Byte and Page (128 bytes) Erase and Write – 100k Write Cycles • On-chip Expanded RAM (ERAM): 1024 Bytes • Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply • USB 1.1 and 2.0 Full Speed Compliant Module with Interrupt on Transfer Completion [ ... ]

AT89C5131A-M PDF Datasheet Download