In addition to the power pin, the front end of the CAN bus interface chip is 2 pins, namely cantx (CAN data transmission) and canrx (CAN data reception), which are connected to the can interface chip and the can controller. The interface chip has three pins at the back end, including a pair of balanced differential signal CANH\/CANL, and another port is shielded ground. These three pins will be networked with other other bus nodes via dedicated cables.