what's timing requirement of GPIOE detect rising/fall edge?

[wen jin zhang]

we now using GPIO as input. when it rise then start timer. but it seem failed. No GPIOE IN event happened.

what's timing need for rising/fall edge detecting? < XX (us)? How sharp it need be?

[Susheel Nuguru]

There is nothing in the GPIO to generate events. When you have enabled the "Sense" mechanism on your input pin through the GPIO configuration, It will generate a detect signal which in turn will generate a PORT event inside GPIOTE.

This detection sampling should happen atleast at the speed of internal clock, so 0.06us. I am pretty confident that the chip won't miss it if it happens.

[Susheel Nuguru]

Yes, that is true, my apologies, only input connect settings from GPIO settings will still be in effect and others ignored. Ignore my comment about the Sense mechanism from GPIO pin setting but my comment on sampling is still valid that it should happen fast enough. What is the rising and falling time for your signal?