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Original question:

TCAN4550EVM: cannot be changed to Normal mode.

TCAN4550EVM: when tcan4550 work in sleep mode ,how can i wake up it

user6487614
Prodigy 70 points
Part Number: TCAN4550EVM
Other Parts Discussed in Thread: TCAN4550

Dear SIr,

We use tcan4550 work in sleep mode for low power.

But I do not know how to wake up it by can bus?

How to send "WUP" pattern?

Otherwise is tcan4550 can wake up by any can bus message?

Regards,

Xu

  • 0
    TI__Guru 50795 points

    Hi Xu,

    The wake up pattern (WUP) used to wake TCAN4550 from sleep mode is described in Figure 8-6 of the device's datasheet. Put simply, this pattern is a filtered dominant-recessive-dominant transition on the CAN bus. The requirements for this pattern are intentionally kept quite broad so that the device will wake up on any valid CAN frame. So in a sense, any CAN message can be used as a WUP. 

    Let me know if you have any more questions.

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Prodigy 70 points

    Dear Eric,

    Thanks for your detailed replies 

    Thanks.