BQ78350: BQ78350 SMBUS

Hi Martin,

The BQ78350 does use clock stretching as needed. I cannot see transaction details or timing information in your picture. Does your host support clock stretching?

Regards,

Matt

Hi Matt,

yes my Controller supports clock stretching. This works also, because I've already seen that the BQ stretches the Manufacturer Access commands. So it works fine.

I attached a log of the SMBus. You can open it with Pulseview ()

SMBusProblem.zip

If you need the data in a different format, just say, I can convert them.

Hi Martin,

I can try downloading the software to take a look if our firewall allows. Have you tried using the BQStudio software with this device and comparing the waveforms?

Best regards,

Matt

Which waveforms you mean? It seems BQStudio is also doing these requests again if they are not successful

Hi Martin,

The BQ78350 is communicating frequently with the battery monitor IC on the I2C bus, so often if the SMBus has too much traffic, it may not be able to respond due to limited bandwidth. I am not sure if this is what is happening here. If you reduce the communication frequency on the SMBus, does it help?

Regards,

Matt

I will try that out and will respond here if it helped