BQ76952: How to inform the target (bq76952) to release the I2C bus? (SDA stuck low)

Hello Kyungjae,

Usually sending 8-9 clock signals should reset the I2C communication bus, that should release the bus.

Do let me know if that works!

Best Regards,

Luis Hernandez Salomon

Hello Kyungjae,

I unfortunately do not know how this would be accomplished with the MSPM0, you may have to open an E2E asking them. But this would have to be set by the MCU to the bq76952.

Best Regards,

Luis Hernandez Salomon

Hello Kyungjae, 

I just wanted to give a quick update here. I just found out that performing a partial reset should also be able to clear a stuck communication line on this device!

This would mean pulling RST_SHUT high for less than 1 second. You could also try this to see if it releases the bus.

Best Regards,

Luis Hernandez Salomon

Hi Luis,

I appreciate your feedback! I couldn't get the communication bus clear with pulling the RST_SHUT high for less than 1 second but that could be due to something unknown on our custom board. I was also able to clear the bus by manually shorting the SCL line to GND a couple of times (to simulate 8+1 clock cycles) in case it helps anybody having the same problem.

Thank  you,

Kyungjae Lee