Hi Team,
Could you verify that my understanding for the sequence of events of a power event is correct? (single signature 4-pair)
In Semi-auto mode, after turn on a channel using 0x19h,
1) A "power enable status change" event should happen and this should be indicated in register 02h in the lower order bits. Register 10h should have the bits set for PE for that channel.
2) A "power good status change" event should then happen and this should be indicated in register 02h in the higher order bits. This is confirmation that the channel has been powered on successfully. Register 10h should have the bits set for PG for that channel (also PE)
3) From now on, as long as the channel is receiving appropriate power, register 10h should have the bits set for PE and PG for that channel.
The background is that the customer is testing start faults, and datasheet for register 08h says:
"When a Start Fault is reported and the PECn bit is not set, then the Power-On Fault register (0x24h) will indicate the cause of the fault"
When customer powers on the port for the simulated PD, they get an inrush fault right away. When handling the inrush fault, check register 10h to see if PE bit is set and in some cases where it is not set, so end up reading 0x24h for the cause of Start fault.
Thank you,
Delaney
