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BQ79656-Q1: BQ79656 STACK Function question for 20S battery

Part Number: BQ79656-Q1

Tool/software:

Hi Team,

Customer has a 20s battery is required in series. So need BQ79656 STACK Function
Customer would like check how the first BQ79656 is filled with 16s and the rest of the 4s are connected to another BQ79656


1.The VC0 of the second BQ79656 would connect CELL 17 negative or Serial up?  Or is VC0 going to be negative to CELL 1? 


2., For BAT PIN. The first BQ79656 is to be connected CELL16 positive, am I right?  Or the first BQ79656 is to be connected CELL20 positive?