SLUUBT5C November 2018 – June 2021 BQ40Z80
Set Settings:Pin Configuration[MFP20_SEL0][MFP20_SEL1][MFP20_SEL2] = 010 to select GPIO or PDSG. When this mode is selected, the LEDCNTLB and LEDCNTLC pins can be used as general purpose single-bit inputs or outputs and LEDCNTLA is used as PDSG. When PDSG mode is selected, the LEDCNTLA pin is used as an enable pin to control a PFET gate. The PFET enables/disables a PRE-DISCHARGE mode to slowly charge up the load before the DSG FET is turned on. This pin is driven low to turn on the PFET and to enable PRE-DISCHARGE mode. It is driven high to turn off the PFET. The PFET will need a resistive pullup to keep it turned off while the gauge is in SHUTDOWN (then the pin is in HIGH-Z mode).