This part is a kind of semiconductor called AT90S2323.

Function of this product has 8-Bit Microcontroller with 2K Bytes of In-System Programmable Flash.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • Utilizes the AVR® RISC Architecture • AVR – High-performance and Low-power RISC Architecture – 118 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General-purpose Working Registers – Up to 10 MIPS Throughput at 10 MHz • Data and Nonvolatile Program Memory – 2K Bytes of In-System Programmable Flash Endurance: 1,000 Write/Erase Cycles – 128 Bytes Internal RAM – 128 Bytes of In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles – Programming Lock for Flash Program and EEPROM Data Security • Peripheral Features – One 8-bit Timer/Counter with Separate Prescaler – Programmable Watchdog Timer with On-chip Oscillator – SPI Serial Interface for In-System Programming • Special Microcontroller Features [ ... ]

AT90S2323 PDF Datasheet Download