ZHCSI09S June 2010 – August 2018 TPS65911
HDRST is a cold reset input for the PMIC. High level at input forces the TPS65911 device into off mode, causing a general reset of device to the default settings. The default state is defined by the register reset state and boot configuration. HDRST high level keeps the device in off mode. When reset is released and HDRST input goes low, the device automatically transitions to active mode. The device is kept in active mode for the period tDONIT1, after which another power-on enable reason is required to keep the device on.
The HDRST input is in the VRTC domain and has a weak internal pulldown, which is active by default.