Quote Originally Posted by dsicon View Post
...the chips on the table are
BQ34z100 (which clearly and literally describes 'i2c')
and
BQ20z70 (which calls out SBS)
plans were laid to use the 34z and now they want to change to the 20z in the pack and it has me worried a bit
thanks in advance for any advice or experience in this area
http://www.ti.com/lit/ds/symlink/bq20z70-v160.pdf

Page 2 clearly shows I2C between bq20z70 and bq29330, in theory you should be able to talk to it using PBP.

BUT "It is designed to work with the bq29330"

How complicated stuffing a PIC in there might be more than just sending a few read/write commands (still going though datasheet).

Robert