We have a board which interfaces a microcontroller with the BQ76952 over
I2C. We can successfully utilize the direct command and subcommand
functionalities, and can therefore see in the Battery Status register
that we're successfully initializing the IC, that the chip is in
FULLACCESS mode & CFGUPDATE mode. Based on the Technical Reference and
the MSP430 Example code, we're trying to init the prereg, and both REG1
and REG2; but it doesn't seem to be working. If we've interpreted the
resources correctly, the below timing diagram is correct:
(enabling preregulator)
However, the regulators don't seem to be working, and when trying to
read back the REG12 Config and REG0 Config, we're getting 0xff, which
seems it may be a failure to read.