DETECT signal nrf52840

RE: DETECT signal nrf52840

Hung Bui — Thu, 26 Jan 2017 05:51:29 GMT

It should not cause a pulse, it showed in the Figure in the spec.

RE: DETECT signal nrf52840

Martijn — Wed, 18 Jan 2017 15:24:55 GMT

It suspect it would pulse when I clear the LATCH register of the GPIO in LDETECT mode. But what happens when I clear the LATCH register of the GPIO in DETECT mode?

RE: DETECT signal nrf52840

Hung Bui — Wed, 18 Jan 2017 13:35:31 GMT

I would assume that the common DETECT should still have the pulse. But I haven't tried myself :)

RE: DETECT signal nrf52840

Martijn — Wed, 18 Jan 2017 07:01:57 GMT

Good point! didn't even think about that. How does it work in that case?

RE: DETECT signal nrf52840

Hung Bui — Tue, 17 Jan 2017 12:30:45 GMT

I agree, the documentation could be clearer regarding the 2 ports and how DETECT is connected especially if one is in DETECT mode and one is in LDETECT mode.

RE: DETECT signal nrf52840

Martijn — Mon, 16 Jan 2017 14:26:08 GMT

Yes, you are correct, I meant LDETECT mode. I do not have nRF52840 here right now, but i was writing a common driver for both versions, but could not find any clear documentation about this. For now I implemented it exactly like you said and will test when we have a nRF52840 here. It works as expected on the nRF52832.

RE: DETECT signal nrf52840

Hung Bui — Mon, 16 Jan 2017 14:19:02 GMT

Hi Martijn,

It's true that we have 2 GPIO ports. But the DETECT signal are single. So DETECT from both ports are connected together.

SENSE level of a pin on any port will result in a DETECT signal.

A clear of the LATCH on one PORT won't cause DETECT signal in normal mode to change. I guess you are talking about the LDETECT mode ? I haven't tested my self but I believe it will cause the common DETECT signal a pulse as showed in Figure 23 in the spec. I think it worth to test.

The implementation in our SDK is not using LDETECT for now.