CAN COMMUNICATION SYSTEM: CAN Communication Control Circuit

CAN communication control circuit is incorporated into the control unit and transmits/receives CAN communication signals.

Fig 1: CAN Communication System Diagram

Courtesy of NISSAN NORTH AMERICA, INC.

Component

System description

CAN controller

It controls CAN communication signal transmission and reception, error detection, etc.

Transceiver IC

It converts digital signal into CAN communication signal, and CAN communication signal into digital signal.

Noise filter

It eliminates noise of CAN communication signal.

Termination circuit⁽¹⁾
(Resistance of approx. 120 Ω)

Generates a potential difference between CAN-H and CAN-L.

⁽¹⁾	These are the only control units wired with both ends of CAN communication system.