The charger includes watchdog timer 175s (default value and adjustable via WDTMR_ADJ) to reset some registers including:

• Reset CHARGE_CURRENT() to 0 A to disable charge;
• Reset EN_CHG_TMR bit to 1b to re-enable CHG timer. If it is already enabled then no change.
• Reset EN_OTG bit to 0b to disable OTG operation.
• Reset ADC_EN bit 0b to disable ADC to save quiescent current.

There are four methods to reset the watchdog timer to prevent it from expiration, as long as one of them is met then watchdog timer will be reset:

• Write CHARGE_VOLTAGE() register;
• Write CHARGE_CURRENT() register;
• Write WD_RST bit to 1b, this bit will automatically to back to 0b after watchdog timer is reset.
• Update a new watchdog timer value at WDTMR_ADJ bits, then the timer is reset with new value.

Write WDTMR_ADJ = 00b to disable watchdog timer. New non-zero charge current value has to be written to charge current register CHARGE_CURRENT() to resume charging after watchdog timer expires.