Figure 10-1. Using Cell Input Pins for Interconnect Measurement
If this connection across an interconnect is not needed (or it is preferred to avoid the extra resistor and
capacitor), then the unused cell input pins should be shorted to adjacent cell input pins, as shown in
for VC11.
Figure 10-2. Terminating an Unused Cell Input Pin
A configuration register is used to specify which cell inputs are used for actual cells. The device uses this
information to disable cell voltage protections associated with inputs which are used to measure interconnect or
are not used at all. Voltage measurements for all inputs are reported in 16-bit format (in units of mV) as well as
32-bit format (in units of raw ADC counts), irrespective of whether they are used for cells or not.
10.2 General Purpose ADCIN Functionality
Several multifunction pins on the BQ769142 device can be used for general purpose ADC input (ADCIN)
measurement, if not being used for other purposes. This includes the TS1, TS2, TS3, CFETOFF, DFETOFF,
HDQ, DCHG, DDSG, and ALERT pins. When used for ADCIN functionality, the internal bandgap reference is
SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021
Copyright © 2021 Texas Instruments Incorporated
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