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TCAN4420: Application comparison

Ryker She
Expert 4440 points
Part Number: TCAN4420
Other Parts Discussed in Thread: TCAN1057A-Q1, TCAN1044A-Q1,

Tool/software:

Hi team,

Could you help to explain the difference between SCI converted to CAN and SPI converted to CAN. Customer needs to confirm which solution is better.

BR,

Ryker

  • +1
    TI__Mastermind 28440 points

    Hi Ryker,

    First, I would recommend migrate to TCAN1044A-Q1 (standby mode) or TCAN1057A-Q1 (silent mode). Those are new generation CAN transceivers with CAN FD and up to 5Mbps supported data rates. TCAN4420 as an old device is no longer recommended for new designs as the price is higher.

    Both SCI (UART) and SPI to CAN conversion require MCU to format the data into the required CAN message format. It's hard to say which solution is better since it's all depend on customer's using case. SPI is preferred for high-speed communication between chips or when connecting multiple devices over short distances. UART is more suitable for applications requiring longer-distance communication.

    TI has MSPM0 series MCU that can provide SPI / UART to CAN bridge demo code. 

    https://www.ti.com/lit/sd/slaaej3/slaaej3.pdf

    https://www.ti.com/lit/sd/slaaej2/slaaej2.pdf

    Regards,

    Sean