nRF52840 GPIO timing question

RE: nRF52840 GPIO timing question

GlennF — Tue, 09 Jul 2019 12:28:14 GMT

So, we wrote a quick test app and I verified that it reliably responds to a 20 ns wide pulse. My generator doesn't create pulses more narrow that this, so I couldn't find its pain threshold, but this reassures me that it should do fine with a 56 ns pulse width.

RE: nRF52840 GPIO timing question

Jared — Tue, 09 Jul 2019 10:22:52 GMT

Hi,

I don't think that this has been measured and specified. My guess is that it should take less than 100 ns but i'm uncertain if it's less than 56 ns. Exactly what ADC are you planing to use? I think the quickest way to find out is to try and see if it can respond to it.

regards

Jared

RE: nRF52840 GPIO timing question

GlennF — Fri, 05 Jul 2019 15:15:36 GMT

Forgot to mention, using Low Power mode, MClk/16, 16.385 MHz crystal