This part is a kind of semiconductor called AT90CAN128.

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 – 133 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers + Peripheral Control Registers – Fully Static Operation – Up to 16 MIPS Throughput at 16 MHz – On-chip 2-cycle Multiplier • Non volatile Program and Data Memories – 32K/64K/128K Bytes of In-System Reprogrammable Flash (AT90CAN32/64/128) • Endurance: 10,000 Write/Erase Cycles – Optional Boot Code Section with Independent Lock Bits • Selectable Boot Size: 1K Bytes, 2K Bytes, 4K Bytes or 8K Bytes • In-System Programming by On-Chip Boot Program (CAN, UART, ...) • True Read-While-Write Operation – 1K/2K/4K Bytes EEPROM (Endurance: 100,000 Write/Erase Cycles) (AT90 [ ... ]

AT90CAN128 PDF Datasheet Download