BQ79616: Negative cell voltage measurement

Part Number: BQ79616

Tool/software:

Dear experts,

In my application case, there is negative cell voltage indeed.

for instance, A point = -1V, B point = -2V, C point = -3V, D point = -4V, etc. BQ79616 is powered externally.

in this case, BQ79616 is able to measure the negative cell voltage? The datasheet has statement like below,

 it seems not, VC1 - VC0 must > 0, VCn to AVSS > = 3V.

then how to understand the -1V voltage measurement in datasheet? it seems that CELL1 need be always positve for negative voltage measurement. but if all CELL were negative voltage, it doesn't work, correct? 

Cheers.

Alex