GPIO SENSE->DETECT Pulse Length requirement nRF51

[Jon (jono)]

Hi I cannot find the minimum pulse length to trigger wakeup using DETECT from GPIO hw pin configured as SENSE pin in the data sheet for nRF51822.

Ex: set PIN_CNF[0].SENSE = High, and configure DETECT interrupt and go to system OFF mode.

How long pulse is required on pin0 to wake system from OFF mode.

[Roger Clark]

Looks like a duplicate of this question

devzone.nordicsemi.com/.../

[Jon (jono)]

No not duplicate. That topic discuss reaction time for software.

My question is regarding minimal puls length for wakeup from system off mode using SENSE->DETECT combo. I'm fully aware that I cannot detect which of all SENSE enabled pins that generated the DETECT, but that's not a problem.

I just want the requirement on the SENSE-part, and I cannot find this in the datasheet.

[Hung Bui]

Hi Jon,

Information I got from our R&D is the minimum pulse width for SENSE is about 100ns on the nRF51.