sleep sate in zephyr

RE: sleep sate in zephyr

Hardik — Fri, 29 Mar 2019 05:17:23 GMT

Hi Jlz,

We do facing the same issue with Sleep current issue with nRF51822.

Can you please suggest how could you achieve 20uA from 300uA?

What changes did you implement in Firmware or HArdware?

We have used only 16MHz crystal in our design and kelp 32KHz DNP. Any suggestion to disable all the block?

RE: sleep sate in zephyr

Jakub Rzeszutko — Fri, 04 Jan 2019 19:02:54 GMT

Try this patch:

github.com/.../12259

RE: sleep sate in zephyr

flip-flop — Fri, 04 Jan 2019 10:37:49 GMT

Hi jlz

Did you find the solution for the problem? I'm facing the same problem on my nrf52832. Power consumption is around 300uA in sleep mode. Power off works fine (bellow 1uA).

And what do you mean by ASIC blocks? Application-specific integrated circuit?

Thank you.

RE: sleep sate in zephyr

haakonsh — Fri, 20 Jul 2018 14:16:03 GMT

A scope of the current consumption would help a ton. I do not know if this is a flat 20µA or periodic spikes in current consumption.

RE: sleep sate in zephyr

jlz — Fri, 20 Jul 2018 08:47:13 GMT

Yes you are right we know now that internal blocks of the ASIC are consuming current. We have disabled all of them and we can see that on a Nordic reference hardware we can go below 300uA but we still see that we are far from the 2uA that we expect it will consume. We can see ~20uA in sleep now. So what part of the system are still consuming is hard to find without your help.

RE: sleep sate in zephyr

haakonsh — Thu, 19 Jul 2018 13:25:36 GMT

Hey Johan,

What peripherals and clock sources are you using? It's probably a peripheral or clock source that is kept running.

Do you have a scope of the current measurement waveform?

Cheers,

Håkon.