ADM1276 troubleshoot with the PMBUS


Each time we read words trough PMBUS interface, the ADM1276 replies "C0". It happens with all the word registers. We monitored the SDA with an oscilloscope to confirm the "C0" word.

The powergood, the OV and UV threshold works fine.

We have already changed the components, same results.

Do you have any idea?



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