BQ32000: Write and read protocol realization

Hi Mahesh,

Yes, this seems to be the correct address for 8-bit operation based on the datasheet, but I don't have a board to check this on. However, I will try to help you debug. I recommend to begin by checking your I2C waveforms (Make sure that you are correctly following the I2C protocol outlined in datasheet section 7.5.1):

• Do you have the appropriate pullup resistors on the SDA and SCL lines?
• Are you properly sending START and STOP (high-to-low and low-to-high transition while clock is high, respectively)
• Are you receiving an ACK after writing the device address, register address, and register data?

I also want to provide a link to another post in the forum that may be related to your issue (excerpt and link below);

"The BQ32000 has an internal buffer which is updated with the RTC counter data every second. The user only has access to this internal buffer and not the real time keeping counters. If the user is in the process of reading the time from the internal buffer, the 1 second update is stopped until the read is complete. The internal buffer is then updated immediately after the read is complete (instead of waiting for the next 1 second update).As a result the user will never see a rollover condition while doing a read of the registers. I hope this answers your question."

Related post:

Kind regards,
Lane