This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCD90160A: 0xFF in command

Part Number: UCD90160A

Hello,

I am using the UCD90160A and am confused by some of it's behavior. In UCD90xxx Sequencer and System Health Controller PMBus Command Reference"  SLVU352G–March 2010–Revised April 2019 it says that command is a read/write byte. However it seems that regardless of whether or not the product is on, I always get 0xFF when I query. Is this really a write only command? is it expected that I should get back a meaningful value?

Thanks,

Adam