Controller area network communication module for motor vehicle, has protocol kernel with clock signal having small frequency jitter, and logic block having message handler and supplied with clock signal having modulated clock frequency

摘要

The module has a protocol kernel (14), and a CAN logic block (12) with a module interface for connection to an external peripheral bus, where the kernel and the block have separate clock inputs. The kernel is supplied with a clock signal having a small frequency jitter and a low clock frequency. The block is provided with a message-RAM and a CAN-message handler (26), and supplied with a clock signal having a modulated clock frequency.