Minimum input current on GPIO input

RE: Minimum input current on GPIO input

Viggomh — Thu, 06 Aug 2020 13:13:31 GMT

Hi, ok, that gave me a better understanding, thanks

What is defining the capacitance of the input so I can calculate tau?

Best regards

Viggo

RE: Minimum input current on GPIO input

haakonsh — Thu, 06 Aug 2020 12:51:21 GMT

The input current is dependent on what you rise- and fall-time requirements are. In essence, the pin is just a capacitor that you charge/discharge and the amount of current applied determines how fast that happens.

The real answer is that if you have a strict requirement you will have to measure it for yourself.

Why do you need to know the minimum input current, are you spec'ing a pull-up resistor or something?

-Håkon

RE: Minimum input current on GPIO input

Viggomh — Thu, 06 Aug 2020 12:25:49 GMT

Hi,

Thanks, but those are for Output right? I was looking for input

Best regards,

Viggo

RE: Minimum input current on GPIO input

Marte Myrvold — Thu, 06 Aug 2020 12:18:28 GMT

Hi Viggo.

The electrical specification for the GPIO on nRF9160 can be found here.

Best regards,

Marte