This part is a kind of semiconductor called ATtiny4313.

Function of this product has 8-bit Microcontroller.

Manufacturers : Atmel

Image and pinout :

Some of the text within the PDF file :

Features • High Performance, Low Power AVR® 8-Bit Microcontroller • Advanced 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 – 2/4K Bytes of In-System Self Programmable Flash • Endurance 10,000 Write/Erase Cycles – 128/256 Bytes In-System Programmable EEPROM • Endurance: 100,000 Write/Erase Cycles – 128/256 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 Chann [ ... ]

ATtiny4313 PDF Datasheet Download