ZHCSI09S June 2010 – August 2018 TPS65911
The watchdog has two modes of operation.
In periodic operation, an interrupt is generated with a regular period defined by the WTCHDG_TIME setting. The IC initiates WTCHDOG shutdown if the interrupt is not cleared within the period. The watchdog interrupt WTCHDOG counter is reinitialized when NRESPWRON is low.
In interrupt mode the IC initiates WTCHDOG counter when interrupt is set pending and is cleared when interrupt is cleared. If no interrupt is cleared before watchdog expiration within WTCHDG_TIME, the device goes to off mode.
By default, periodic watchdog functionality is enabled with the maximum WTCHDG_TIME period.