Other Parts Discussed in Thread: BQ76942
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How do I connect unused VC pins if I have a reduced cell count?
For the BQ76952, VC pins 0, 1, 2, 15, and 16 should always be connected to actual cells, with cells connected between VC0 and VC1, VC1 and VC2, and VC15 and VC16 (or VC9 and VC10 for the BQ76942). All other cell inputs can be shorted to reduce the cell count. An example configuration can be seen in the image below, where a 12S battery pack requires 4 VC pins to be shorted together:
Additionally, after reducing the cell count, you must set the Settings:Configuration:Vcell mode register to correctly reflect which cell inputs are connected; otherwise, CUV faults can trigger for the shorted cell inputs.
The following links provide more information on how to reduce the cell count and explain why certain VC pins need connections.