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Linux/TPS53681: (11h) STORE_DEFAULT_ALL command

hank chu
Intellectual 330 points
Part Number: TPS53681

Tool/software: Linux

Dear Sir:

   In the Technical Reference Manual, Chapter 2.4.7 (11h) STORE_DEFAULT_ALL, it said:

    >> However, the device may be unresponsive during the write operation with unpredictable memory storage results.

    >> TI recommends to disabling power conversion for both channels before issuing this command.

  Q1) To do the NVM programming for TPS53681, should we disable power conversion for both channel

        before issuing the STORE_DEFAULT_ALL command?

  

  Thank you.

Best Regards.

  • 0
    TI__Genius 11095 points

    Hi Hank, yes. I recommend you keep both VR_EN pins low before issuing Store Default operations.

  • 0 in reply to Matt Schurmann
    Intellectual 330 points
    Dear Sir:
    About the TPS53681, if the AVR_EN and BVR_EN pins are both set to HIGH,
    could the power conversion be disabled by F/W as follows?
    1) The procedures to disable power conversion
    1-1) Set the bit[3] of ON_OFF_CONFIG (CMD) to 1b.
    >> Device responds to the ON bit.
    1-2) And set bit[2] of ON_OFF_CONFIG (CP) to 0b.
    >> Device ignores the AVR_EN/BEN pins, and ON/OFF is controlled only by the OPERATION command.

    1-3) Set the bit[7] of OPERATION (ON) to 0b.
    >> Disable power conversion.

    The procedures to enable power conversion use the bits of ON_OFF_CONFIG and OPERATION commands, too.

    Thank you.
    Best Regards.
  • 0 in reply to hank chu
    TI__Genius 11095 points

    Yes. As you have described, it is also ok to disable power conversion through PMBus, by first setting the ON OFF CONFIG command to observe OPERATION, then commanding power conversion off with OPERATION.