This part is a kind of semiconductor called ATmega323.

Function of this product has 8-bit Microcontroller with 32K Bytes of In-System Programmable Flash.

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 Non-volatile Program and Data Memories – 32K Bytes of In-System Self-programmable Flash Endurance: 1,000 Write/Erase Cycles – Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program – 1K Byte EEPROM Endurance: 100,000 Write/Erase Cycles – 2K Bytes Internal SRAM – Programming Lock for Software Security JTAG (IEEE Std. 1149.1 Compliant) Interface – Extensive On-chip Debug Support – Programming of Flash, EEPROM, Fuses, and Lock Bits [ ... ]

ATmega323 PDF Datasheet Download