Ok, how about you mux different behaviours based on some external input.
If pin is pressed(when something is connected) - Then do x
When pin is depressed(when something is not connected) - Then do y
Ok, how about you mux different behaviours based on some external input.
If pin is pressed(when something is connected) - Then do x
When pin is depressed(when something is not connected) - Then do y
How can this be?
Usually a hot swap controller is on the slave board. And the hot swap controller controlls power supply behaviour.
So how can a FPGA do something before it is powerd up?