NRF5340 low-power measurement with PPK2

[Bas van den Berg]

Hi,

I aw various other posts ( nRF5340-DK Low Power Configuration Issues)

and the post on Optimizing power on nRF53 designs  but I never get results that low.

The Blog post doesn't really help, since it only states the Zephyr settings and not the

real software settings. Using the example from the post mentioned above gets the same

results (650 uA on 1800 mV)

Our setup:

PPK as power supply for NRF5430-DK (version 0.11.0)

SB40 is bridged

SW6 to DEFAULT (if no nRFOnly, more current seems to run)

SW9 to VDD

SW10 to ON

For software:

basic loop, while(1) { WFI(); }

and 100 Hz RTC1 based TICK.

HFCLKSRC = HFINT

Other peripherals idle.

When I measure is still get around 650 uA when setting PPK supply to 1800 mV. (around 1000 uA when 3000 mV).

So 2 questions:

- is the hardware setup ok?

- what can we do in the software?

[Simonr]

Hi again,

Can you upload a screenshot of the noisy test samples, as I tried again on another DK and PPK combo and I still see the same "tall and clean" toggling on my end. If you'd like I can set up a lower power sample as well that puts the device to a proper low power mode when the LED is off for example.

Best regards,

Simon

[Jester]

BTW. I am now trying one of our newer DK boards.

Al these boards are of 2.0.0 type.
Together with these boards i get :


2022-09-12T15:41:06.586Z DEBUG Application data folder: C:\Users\0000\AppData\Roaming\nrfconnect\pc-nrfconnect-programmer
2022-09-12T15:41:06.662Z INFO Using nrf-device-lib-js version: 0.4.13
2022-09-12T15:41:06.662Z INFO Using nrf-device-lib version: 0.12.8
2022-09-12T15:41:06.662Z INFO Using nrfjprog DLL version: 10.16.0
2022-09-12T15:41:06.663Z INFO Using JLink version: JLink_V7.66a
2022-09-12T15:41:06.700Z DEBUG App pc-nrfconnect-programmer v3.0.4 official
2022-09-12T15:41:06.700Z DEBUG App path: C:\Users\0000\.nrfconnect-apps\node_modules\pc-nrfconnect-programmer
2022-09-12T15:41:06.700Z DEBUG nRFConnect 3.12.0, required by the app is (^3.12.0)
2022-09-12T15:41:06.701Z DEBUG nRFConnect path: C:\Users\0000\AppData\Local\Programs\nrfconnect\resources\app.asar
2022-09-12T15:41:06.701Z DEBUG HomeDir: C:\Users\0000
2022-09-12T15:41:06.701Z DEBUG TmpDir: C:\Users\0000~1\AppData\Local\Temp
2022-09-12T15:41:10.566Z ERROR Unsupported device.
            The detected device could not be recognized as
            neither JLink device nor Nordic USB device.


0000 is replacement of real user/company name.

Any ideas ?

[Simonr]

Thanks! 

My initial guess is that the solder bridge(s) (SB40 and SB41) are cut, and not shorted to resume normal DK operation. If that's not it, and all the switches are in default mode, please try enabling Verbose logging and upload that log.

Best regards,

Simon