This part is a kind of semiconductor called ATMEGA161.

Function of this product has 8-bit Microcontroller.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • High-performance, Low-power AVR® 8-bit Microcontroller • Advanced RISC Architecture – 130 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers – Fully Static Operation – Up to 8 MIPS Throughput at 8 MHz – On-chip 2-cycle Multiplier • Program and Data Memories – 16K Bytes of Non-volatile In-System Programmable Flash Endurance: 1,000 Write/Erase Cycles – Optional Boot Code Memory with Independent Lock bits Self-programming of Program and Data Memories – 512 Bytes of Non-volatile In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles – 1K Byte of Internal SRAM – Programming Lock for Software Security • Peripheral Features – Two 8-bit Timer/Counters with Separate Prescaler and PWM – Expan [ ... ]

ATMEGA161 PDF Datasheet Download