1. The pin definition of the CAN communication chip is very important, which determines the function and use of the chip.
2. CAN communication chips generally include VCC, GND, CAN_H, CAN_L, RS, TXD, RXD and other pins. VCC and GND are power pins, CAN_H and CAN_L are CAN bus communication pins, RS is an optional resistance pin, TXD and RXD are UART communication pins.
3. Determine the pin definition and use method according to the specific chip model and application scenario, and note that the chip of different manufacturers may be different.