Hi,
Issue:
We connected the bq20z45-R1 to the SMBus of Baytrail and SMBus communication does not works.
Background:
The same bq20z45 is already validated in another platform and works at 60 kHz speed. This is achieved by setting appropriate clock divider Registers.
As per Baytrail spec, the SMBus controller is v2.0 compliant and has inbuilt clock stretching mechanism which allows device to operate at 10kHz to 100 kHz frequency. There are no special registers to modify the Clock Registers.
Questions:
1) Does bq20z45-R1 supports clock stretchin?
2) What is the voltage required to pull the clock low?
3) What is minimum pull up resistor requirement?