TPS6594-Q1: TPS6594-Q1: If PMIC reset occur, PMIC saves the reason why PMIC reset occur?

Jaeyoung Yoo said:

1) When 'ERR_AP_PMIC_BUCK_LDO_OVI' message occured and then PMIC reset is occured, TPS6594 PMIC saves the reason why PMIC reset in the PMIC's register?

As long as the PMIC's VCCA voltage stays above UVLO (2.7V), faults/triggers that caused a recovery attempt are kept in the interrupt registers. The interrupt registers are 0x5A to 0x6C. For details about the interrupt registers and their hierarchy, please refer to section 8.3.9 of the TPS6594 data sheet.

Jaeyoung Yoo said:

2) If PMIC is tunred off, The Error Message that related about 'ERR_AP_PMIC_BUCK_LDO_OVI' is unerasable in PMIC's register?

Once VCCA drops below UVLO, interrupt registers will be cleared.