GPIO Current Specifications

[wjohns2574]

Hello,

I have a question about the nRF52840 device and the supporting documentation. I am trying to figure out the current ratings for the GPIO. On page 198 it states that typical current is 9mA and the max is 14mA. This seems awfully low. What is confusing is that in the next few pages, Figure 25, 26 and 27 show that the max drive/sink current is around 25mA.

I guess what I am trying to figure out is what's the max current allowed? I'm glad I decided to check this, I was about to try to drive a LED between 20 and 30mA.

[wjohns2574]

Thanks for the feedback. Yea an LED isn't all that I'm trying to drive and I wasn't planning on going any higher than 20mA. The main purpose was to see what my max driving capability was per pin for power consumption calculations and to make sure I don't damage the chip.

Turbo J I'm not sure if I'm understanding your statement correctly about the curves still missing for the NRF52840. If you go to the datasheet here: https://www.mouser.com/datasheet/2/297/nRF52840_OPS_v0.5-1074816.pdf , on pages 198 to 200 you will see the GPIO specs with drive and sink strengths.

Thanks again for your responses.

[Turbo J]

That seems to bee an old PDF. Current PS Version in the infocenter is 1.1, and this version does not have GPIO curves.