Minimum pulse length to detect low level with GPIO SENSE for nRF52

RE: Minimum pulse length to detect low level with GPIO SENSE for nRF52

Remo — Tue, 06 Jun 2017 14:28:14 GMT

Thank you very much for the clarification.

RE: Minimum pulse length to detect low level with GPIO SENSE for nRF52

bjorn-spockeli — Tue, 06 Jun 2017 13:44:58 GMT

I apologize for my late reply. Yes, 8uS should also be fine, but the 10uS is still recommend as it was chosen in order to avoid marginal design where external factors reduce the actual pulse width seen by the device.

RE: Minimum pulse length to detect low level with GPIO SENSE for nRF52

Remo — Mon, 29 May 2017 09:27:36 GMT

Hi. Do you have any news? Thanks in advance.

RE: Minimum pulse length to detect low level with GPIO SENSE for nRF52

bjorn-spockeli — Fri, 19 May 2017 08:57:52 GMT

10uS is the number I got from R&D. However, it might be that this is rather conservative. I will look into it and update my answer if it can be adjusted down.

RE: Minimum pulse length to detect low level with GPIO SENSE for nRF52

Remo — Fri, 19 May 2017 05:34:53 GMT

Thanks for your answer. Why is this time much longer for the nRF52832 than for the nRF51822? According to this thread, the nRF51822 only needed 200ns.

RE: Minimum pulse length to detect low level with GPIO SENSE for nRF52

bjorn-spockeli — Thu, 18 May 2017 10:26:56 GMT

Hi Remo,

the minimum pulse width needed trigger DETECT Signal(which in turn will trigger the SENSE signal) is around 10uS.

Best regards

Bjørn