The function of CAN controller mainly has the following two points:
1, receive the data sent by the microprocessor in the control unit, process the data and transmit it to the CAN transceiver.
2, the CAN controller receives the data received by the CAN transceiver, processes the data and sends it to the microprocessor.
There are usually two types of automotive network CAN controllers, as follows:
(1) Independent vehicle network CAN controller: It is relatively independent, very flexible to use, and generally appears in the form of a single integrated circuit.
(2) Combined vehicle network CAN controller: combined with the microprocessor to form a microprocessor control component with CAN control function interface, the use of combined CAN controller, can make the circuit simplified and compact, efficiency can also be improved accordingly.