I have an eval board. Initially, the sequencing appeared to work. Then I removed R52, R53, R55, added pullups and connected the USB programming dongle (only the SCL, SDA, GND via J20). I was able to talk to the board through the dongle. However, I noticed that the sequencing would not start up until there was communications between my PC and the board. So if I unplug the dongle, or don't launch the GUI, there was no sequencing when I power cycled the board.
I thought this was odd, so I created a new programming image that only enabled two pins. I removed all dependencies, fault conditions, and had it set to auto mode with no delays. I still see the same problem. The enables do not come on until there is PMBUS communication. I don't understand this. I do not have it set to switch on due to OPERATE command, the CTRL pin, or any other pin. It should just start up by itself.
What is going on?
