BQ27541 communication

Hello,

I am using the BQ27541 in HDQ mode and am having trouble with some of the data that is returned.

I can read the voltage and temperature fine.  SOC always returns 0 and SOH always returns 89.

Thinking I might have to do some sort of reset or calibration, I tried to figure out the 'Control' functions.  I cannot figure out how to send and receive Control function data.

Note that I am bit banging the HDQ line from an MSP430 device.

Question is twofold:
a) why would I be getting good data from VOLT and Internal Temperature, but bad data from everything else?

b) what is the communication sequence to read and write the 'Control' functions?  The data sheet is of no help here. (for example, to read Voltage, I send 0x09, read most significant byte, send 08, read least significant byte.  How would I read and write to the control functions?  Note that I have verified my HDQ bit timings)

Thanks,

Mark Rush