I am experiencing what appears to be a DVDD fault condition, but am unable to observe any problems on the DVDD output pin. The behavior is as follows:
1) fault pin is asserted by DRV8303
2) Read of SPI status registers indicates NO fault conditions, but shows that all configuration parameters have been reset to defaults.
According to the datasheet, this behavior is indicative of a DVDD fault. However, no change on the DVDD pin can be observed on oscilloscope.
At this point, the workaround is to read the status registers on a fault pin assertion and to send new configuration parameters if they have been reset. Needless to say, this workaround is not ideal.
Does this sound like an actual DVDD fault? If not, what else could be causing this behavior?
