When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

NRF52MCU — Wed, 04 Mar 2020 06:03:34 GMT

Thanks for your help. My issue is solved.

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

Stian Røed Hafskjold — Thu, 06 Feb 2020 13:25:30 GMT

Hi, the calibration is controlled automatically through the softdevice, so you will have to de-initialize the softdevice if you want the calibration to stop.

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

NRF52MCU — Mon, 03 Feb 2020 05:57:21 GMT

External LF crystal is not reserved in my hardware circuit.

How can I turn off calibration?

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

NRF52MCU — Sat, 25 Jan 2020 08:17:50 GMT

Thank you for your reply.
Unfortunately, our company takes annual leave from January 24 to February 2.
I won't be able to verify if this modification resolves my issue until February 3.

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

Stian Røed Hafskjold — Thu, 23 Jan 2020 12:31:26 GMT

When the device stops advertising there's LFRC clock calibration every 4s. I guess that is what you are seeing. The clock calibration takes 16ms.

The calibration uses 10uC of charge, and a calibration interval of 4 seconds gives you 2.5uA extra in average. Which seems to fit well with your observations.

You have two choices:

1. Use LFXO instead (external LF crystal)

2. Turn off calibration after advertising stops.

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

NRF52MCU — Fri, 17 Jan 2020 15:04:18 GMT

OK,I upload it in this thread down

devzone.nordicsemi.com/.../3554.nrf52832_5F00_xxaa.hex

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

Stian Røed Hafskjold — Fri, 17 Jan 2020 13:43:32 GMT

Can you please upload the hex file in this thread

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

NRF52MCU — Fri, 17 Jan 2020 09:14:17 GMT

my hex file in DK.https://mega.nz/#!7ptjzaLS!kDF5SJkpXONEHy1zNU1cx0t-ZhwYXOf04rRN8pNXSYI

use softdevice: s132_nrf52_6.0.0_softdevice.hex

When device BLE advertisement ,LED1 start blink.

When device BLE advertisement and voltag<2.2 ,LED2 blink.

After BLE advertisement 10s ,device go to sleep

When click button 1 or 2 ,device wake up and start BLE advertisement

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

Stian Røed Hafskjold — Thu, 16 Jan 2020 13:57:35 GMT

Hi, it's hard to tell what is going on here without knowing what the application does. If you can post a hex file that I can run here on a DK, I can measure the current using a power analyzer, then it's easier to see what is going on.

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

NRF52MCU — Wed, 08 Jan 2020 02:52:44 GMT

I use below instrument to measure current

(https://www.newark.com/tektronix/dmm4040/multimeter-digital-bench-6-1-2/dp/32R7767)

It is connected in series with the power supply and device

The 60-90uA spikes (interval) about 6~8s

RE: When I call idle_state_handle() , a sudden surge current of 60 ~ 90 uA will appear.

Marjeris Romero — Tue, 07 Jan 2020 11:28:49 GMT

Hi,

How are you measuring the current consumption? And how often do you see the 60-90uA spikes (interval)?

Best regards,

Marjeris