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TCAN4550: selective wake up

Vignesh Chandran
Prodigy 20 points
Part Number: TCAN4550
Other Parts Discussed in Thread: , TCAN1145-Q1

Hello Team,
We need CAN Controller with integrated transceiver which supports selective wakeup and CAN FD too. Do you have any product like this?

  • 0
    TI__Guru 53555 points

    Hi Vignesh,

    Unfortunately, we don't have any such devices available that support partial networking. We are working on such a device, but it will be some time before this is released to market. 

    In the meantime, we may be able to suggest a two-chip solution with a TCAN4550 in controller mode (test mode) and a TCAN1145 acting as the transceiver. Would this be a feasible solution to the current requirements? Or is it possible to wait for the development of an integrated solution?

    Regards,
    Eric Schott

  • 0
    Prodigy 20 points

    Hi Eric,

    It looks this mode is used for testing purposes. Are we allowed to use it for final SOP production? Is it recommended? Also we are using 3rd part NXP transceiver. Will it be compatible with any 3rd party Transceiver?

  • 0 in reply to Vignesh Chandran
    TI__Guru 53555 points

    Hi Vignesh,

    Yes, "test mode" is suitable for production. I agree the name is a bit misleading, but this feature is intended to be used in end products as needed. 

    The protocol on the TXD/RXD side of TCAN4550 while in test mode is standard CAN data and will be compatible with any transceiver that supports the speed of CAN communication. This could interface with TCAN1145 to achieve a partial networking solution or any competitor devices that supports the CAN standard. 

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Prodigy 20 points

    Hello Eric,

    Thank you for the confirmation. We understand that we can use any external can transceiver with TCAN4550 when we are in test mode.
    We have 2 queries :
    1. Whether in test mode (CAN controller mode) CANFD is supported?
    2. Is it recommended to use two SPI channels for CAN controller and CAN transceiver incase of using TCAN4550 ( Test mode) along with TCAN1145 ?

  • 0 in reply to Vignesh Chandran
    TI__Guru 74262 points

    Vignesh,

    1. Yes, CAN FD is supported in these modes. They are called test mode, but they are not how you think of test mode traditionally, as all features are still present beyond the specific configuration. It's called test mode because you'll be "testing" the transceiver or the controller by itself rather than them being used together.

    2. It's recommended because of the interrupts and mode control on the TCAN1145-Q1 that will need to be monitored and configured. While the TCAN4550-Q1 has plenty of interrupts of its own to maintain, the TCAN1145-Q1 will have the interrupts involved with the bus as it will be the transceiver in this configuration. 

    Regards,

    Eric Hackett