Hi Jeeva,
I think we should focus on the faults first. This should not be occurring. Please look at table 4. From your description, the most likely faults are PVDD, DVDD, or GVDD undervoltage.
Please zoom in on the scope and capture these signals prior to the nFAULT pin asserting.
Once the fault is corrected, the next step is to work on the registers.
Is the power pad connected to GND? If not, it must be.
If you think the schematic or layout could be an issue, can you send the schematics and layout?
I think we should focus on the faults first. This should not be occurring. Please look at table 4. From your description, the most likely faults are PVDD, DVDD, or GVDD undervoltage.
Please zoom in on the scope and capture these signals prior to the nFAULT pin asserting.
Once the fault is corrected, the next step is to work on the registers.
Is the power pad connected to GND? If not, it must be.
If you think the schematic or layout could be an issue, can you send the schematics and layout?