TPS6594-Q1: PMIC wd questions

Part Number: TPS6594-Q1

Tool/software:

Hello experts,
here are some question related to PMIC WD:

  • PMIC watchdog (long window mode with Window1 and Window2), what happens to the WD_FAIL_CNT
     if Answer1 is correct, Answer2 is provided incorrectly once, but then Answer2 is provided correctly immediately afterwards, and Answer1 remains correct?
  • If Answer0 is provided incorrectly in the watchdog (Window1/Window2 sequence), does Window2 wait until the correct answer is provided, or does it proceed regardless of the incorrect response?
    Does the next sequence starts even if the wrong Answer0  is provided?

Thanks

  • Referring to Figure 8-27 in the TPS6594 Data sheet and using the nomenclature it presents:

    Window1 - Answer3, Answer2, Answer1

    Window2 - Answer0

    PMIC watchdog (long window mode with Window1 and Window2), what happens to the WD_FAIL_CNT
     if Answer1 is correct, Answer2 is provided incorrectly once, but then Answer2 is provided correctly immediately afterwards, and Answer1 remains correct?

    WD_FAIL_CNT would increment by 1 and only increments by 1 per bad Window-1 + Window-2 period. It doesn't matter if 3 bad answers are sent or 1 bad answer. Conversely, WD_FAIL_CNT only decrements per good Window-1+Window-2 period.

    If Answer0 is provided incorrectly in the watchdog (Window1/Window2 sequence), does Window2 wait until the correct answer is provided, or does it proceed regardless of the incorrect response?
    Does the next sequence starts even if the wrong Answer0  is provided?

    the next sequence will start even if the wrong Answer0 is provided, unless WD_FAIL_CNT > WD_FAIL_TH +WD_RST_TH