UCD90160: How to read checksum value of UCD90xxx?

Part Number: UCD90160

Dear team,

I want to read UCD90160 device checksum value and follow below E2E step.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/319955/ucd9090-programming

But when input address 0x17FFC for reading checksum, I cannot get the result. Could you share comments to fix this issue? Thanks.

Regards,

Ben