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TCAN4550: TCAN4550

Jingguo Wang
Intellectual 1700 points
Part Number: TCAN4550

Tool/software:

Hi team,

 I am reaching out to verify some technical details.

    • How many devices dose it support? Customer maximum requirement is 4 outdoor unit and 80 indoor unit, which should be connected to CAN bus.
    • How many GPIOs  does it need at least? I know the PIN of SPI communication is necessary. For other GPIOs, which are necessary?
    • Can we provide example driver code with CUSTOMER?

BR

Jingguo

  • 0
    TI__Mastermind 27080 points

    Hi Jingguo,

    Jingguo Wang said:
    How many devices dose it support? Customer maximum requirement is 4 outdoor unit and 80 indoor unit, which should be connected to CAN bus.

    The TCAN4550 is designed to communicate on a CAN bus that conforms to the ISO 11898 specifications.  Each device adds some additional load to the CAN bus along with the overall loading that comes from the wiring and bus termination.  If the CAN bus wiring and the loading from all the other devices still meets the ISO 11898 specifications, then there should not be an issue.

    Jingguo Wang said:
    How many GPIOs  does it need at least? I know the PIN of SPI communication is necessary. For other GPIOs, which are necessary?

    The 4 SPI signals (nCS, SCLK, SDO, and SDI) are required. 

    The interrupt pin (nINT) is highly recommended, but it could be possible to only poll the device registers through SPI to see if new messages and any interrupt bits have been set, but this is very inefficient and slow.

    The reset (RST), wake request (nWKRQ), and the general purpose IO's (GPIO1 and GPO2) are also optional.

    Jingguo Wang said:
    Can we provide example driver code with CUSTOMER?

    Yes, it is linked to the product folder in the software development section.  Please review the datasheet and TCAN4550 product folder for information and resources available for this device.

    Regards,

    Jonathan