COMP/LPCOMP vs GPIOTE interrupt latency

RE: COMP/LPCOMP vs GPIOTE interrupt latency

Kenneth — Wed, 02 Jun 2021 12:10:21 GMT

Unfortunately we don't have detailed numbers that you may compare here. I guess you would need to measure them yourself if they are critical, e.g. from toggling the input until the interrupt handler is toggling an output.

You can find some values here also that may be relevant, since the CPU will may need to startup if the chip is in idle or sleep:
https://infocenter.nordicsemi.com/topic/ps_nrf52833/power.html#unique_1449636937

It looks like it's mostly in the lower ~us range, so I would not expect a big difference.

Kenneth

RE: COMP/LPCOMP vs GPIOTE interrupt latency

Michael Lawton — Mon, 31 May 2021 16:51:11 GMT

It doesn't say much about the latency of a GPIO interrupt though. Basically I'm just wanting to know how long I can expect between a change on the input and some code being run, and how that compares between LPCOMP, COMP and GPIOTE.

RE: COMP/LPCOMP vs GPIOTE interrupt latency

Kaja — Mon, 31 May 2021 13:55:23 GMT

Hi,

here is a link to GPIO Electrical Specification, in the info center.

Best regards,
Kaja