SLUSDF9 June 2020 BQ25790
The host can reset the system power by:
When the system power reset is enabled, the device turns off the ship FET and also sets the charger in HIZ mode if VBUS is high for tRST_SFET (typical 350ms), then turns on the ship FET and also disable the charger HIZ mode to provide full system power reset. When the SFET is off for tRST_SFET, the charger applies a typical 30mA sink current on SYS to discharge system voltage down.
No matter the charger is at battery only condition or in the forward charging mode with adapter present, the charger resets the system power when the SDRV_CTRL[1:0] bits are set to 11 or the QON pin is pulled low for tRST duration.