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Original question:

TCAN1042HGV-Q1: DC/DC Control Can Transceiver Recommendation

TLIN1021-Q1: DC/DC Control LIN Transceiver

CHO SR
Genius 3415 points
Part Number: TLIN1021-Q1
Other Parts Discussed in Thread: LM5160

Hi,

The customer wants to LM5160 control the same using LIN transceiver.

Please answer the customer's question.

Q1. After entering Sleep mode (A), when requesting LIN wake-up, it enters Standby mode (B).

When the EN pin changes from Low to High, it enters Normal mode (C).

Is there a time limit to wait for the EN signal to be high to move from B to C after entering A to B?

If EN doesn't go high even after a certain period of time, will it be changed to Sleep mode again?

Q2. Please let me know the pattern information of LIN wake-up for wake-up test.

  • +1
    TI__Genius 15345 points

    Hello,

    Sleep mode can only be entered from normal mode by the EN pin going low. Once the device is in standby mode it can no longer enter sleep mode.

    Once the device has fully entered standby mode then you can pull the EN high and it will go into Normal mode. However there are timing characteristics that you have to wait for for the device to be fully in standby mode.

    The first thing to keep in mind is that the time changes based on how you wake the device up:

    For a WAKE pin wake up:

    It can take 5-50us for the device to recognize the wake request and wake up from sleep mode.

    For a LIN bus wake up:

    It can take 25-150us for the device to recognize a lin bus wake request and wake up.

    Then to go from standby to normal mode you have to include the tMODE_CHANGE and t_NOMINT

    This can be up to an additional 60 us.

    It doesn't matter how long you wait to pull EN high the device will stay in standby mode until you pull EN high.

    CHO SR said:
    Q2. Please let me know the pattern information of LIN wake-up for wake-up test.

    I'm a little confused by what you mean. Are you asking how to perform a wake up request on the LIN bus? If this is the case then you just have hold the LIN bus dominant for at least 150 us. This means that you use another LIN transceiver in normal mode and transmit a low on TXD for at least 150 us.

    Best,

    Chris