The AT7908E is a CAN controller stand-alone device for space application. Redundant structures and special techniques are implemented in order to make the device SEU tolerant. The AT7908E CAN core provides all CAN 2.0B protocol functions except the overload frame generation. It includes the acceptance filtering. The core incorporates error-handling capabilities, the stuff bit generation, CRC, multiple sample points and remote frame generation. The AT7908E provides a programmable MCU 8bit general-purpose interface to connect receive and transmit buffer, control register and status register to CPU.