This part is a kind of semiconductor called ATTINY2313.

Function of this product has 8-bit AVR Microcontroller with 2K Bytes 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 – 120 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers – Fully Static Operation – Up to 20 MIPS Throughput at 20 MHz • Data and Non-volatile Program and Data Memories – 2K Bytes of In-System Self Programmable Flash Endurance 10,000 Write/Erase Cycles – 128 Bytes In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles – 128 Bytes Internal SRAM – Programming Lock for Flash Program and EEPROM Data Security • Peripheral Features – One 8-bit Timer/Counter with Separate Prescaler and Compare Mode – One 16-bit Timer/Counter with Separate Prescaler, Compare and Capture Modes – Four PWM Channels �� [ ... ]

ATTINY2313 PDF Datasheet Download