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SN65HVDA1040A-Q1: Recovery time from TXD dominant time-out

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Replies: 4

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Part Number: SN65HVDA1040A-Q1

Hi Champs,

My customer asked question about recovery time from TXD dominant time-out.

When device detects dominant time-out, device will set TXD disable until it detects recessive on CAN bus.

After detecting the recessive, how long will it take the device recovering from disabled state?

Best regards,

  • Fujihara-san,

    As soon as a recessive edge is detected, the driver will be re-enabled and communication can continue. I've tested this in the lab by asserting dominant timeout, then transmitting a square wave from a function generator. There was no break in the square wave from the dominant timeout state.

    Regards,

    Eric Hackett

    Texas Instruments | INT-TRX| Applications Engineer

  • In reply to Eric Hackett:

    Eric-san,

    Thanks a lot for the confimation.

    Can we say the delay is far below us order?

    Best regards,

  • In reply to NOBUO FUJIHARA:

    Fujihara-san,

    I'll have to go in the lab to get the exact delay, but it is short enough to where I didn't observe any delay at 250kHz messaging.

    Regards,

    Eric Hackett

    Texas Instruments | INT-TRX| Applications Engineer

  • In reply to Eric Hackett:

    This thread is now being addressed through email, so this thread can be closed.

    Regards,

    Eric Hackett

    Texas Instruments | INT-TRX| Applications Engineer

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