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TPS65381-Q1: PMIC query

Part Number: TPS65381-Q1

Hi, Team,

I want to initiate the power down sequence in this PMIC. So I kept the settings in registers as follows:

NO_SAFE_TO = 0

PWD_THR[3:0] = 1

SAFE_LOCK_THR[3:0] = 0

 

I am using watchdog in trigger mode. When I stop giving the pulses to PMIC WD, DEV_ERR_CNT[3:0] increments to 1.

What I expected after this,  ??   Is PMIC to start in standby mode. But PMIC goes to reset mode and board restarts even without ignition signal.

 

When I shutdown the board, I want it to start only when wakeup signal comes e.g ignition. But intended operation is not getting fulfilled.

Let me know your inpust to solve this issue .

Regards

Dilip