NRF52840 not going into systemOFF

RE: NRF52840 not going into systemOFF

Jared — Fri, 07 Jun 2019 12:51:36 GMT

Hi,

Please refer to Figure 2. Measuring current on custom hardware with an external power source and the nRF5 DK

Regards

Jared

RE: NRF52840 not going into systemOFF

jonas.woerner — Thu, 06 Jun 2019 10:54:29 GMT

I placed it right in main()

sdk14 with the 5.0.2-alpha (also tried with 6.0 in SDK15)

no, I dont have a meter with that precision.

but I found out, that it might be faulty measssurements imn doing.

how can I supply the DK with external dut power supply? because strangely, if I use external supply and DUT select is on DK, I read way more current than if I use DK power for measuring...

If I measure an external device, like the NRF usb stick, then I really get to sub 1uA. So how do I measure the DK properly?

RE: NRF52840 not going into systemOFF

Jared — Wed, 05 Jun 2019 11:48:04 GMT

Hi,

Where in the code do you place the line?
Which softdevice and SDK version are you using?
Which version of the nRF52840 are you using? Are you using the DK or a custom board?
Could you try flashing the DUT with the pwr proifling example from the SDK. What current do you measure?
Do you have an ammeter available so that you can see if you measure the same current?

Regards

Jared