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Original question:

TLIN1021A-Q1: No state transition from unpowered to sleep since TLIN?

TLIN1021A-Q1: Additional questions from my previous thread

Yoshikazu Kawasaki
Intellectual 961 points

Part Number: TLIN1021A-Q1

Tool/software:

Hello Michael-san,

I got a couple of additional questions from my customer for the thread shown below.  You gave me comments "it simplifies MCU control logic (no need to wait for a LIN pulse after cold start)".  My customer would like to know exactly what the logic means here.  Would you please elaborate what the logic means here?  Do you mean the LIN pulse would make MCU logic complicated?

They'd also like to know what "no need to wait for a LIN pulse" means.  Would you please tell me the reason why standby mode after cold start doesn't require LIN pulse whereas sleep mode does?  I don't think I looked through the LIN specification well enough, but I don't find such information in it.  If you can point where it is described in it, it is OK.

TLIN1021A-Q1: No state transition from unpowered to sleep since TLIN? - Interface forum - Interface - TI E2E support forums

Best regards,

Yoshikazu Kawasaki

  • 0
    TI__Guru 63817 points

    Hi Yoshikazu-San,

    The MCU software becomes simpler i.e., no need to code logic that waits for LIN wake-up pulse when the transceiver powers up (cold start)

    • During a cold start, the device defaults to a specific mode.
      • If sleep mode and a valid LIN wake-up pulse may be needed to transition to normal mode.
      • If standby, the MCU can directly control EN pin without waiting for LIN wake-up pulse and eliminates the need to monitor LIN for pulses saving time and simplifying code.
    • No worries, please see 9.4.4 of the data sheet defining a remote LIN wake-up pulse, thanks.

    Best Regards,

    Michael.