NRF5340 power consumption issue when QSPI is disabled.

RE: NRF5340 power consumption issue when QSPI is disabled.

Jørgen Holmefjord — Tue, 21 Dec 2021 16:18:36 GMT

Hi,

At what frequency is the scalable QSPI input clock (PCLK192M) running at? This can be configured in register HFCLK192MCTRL. When running at the full 192MHz speed the device uses more current (with a sleep current of ~700uA).

To lower the sleep current consumption you would need to configure the QSPI to a lower frequency during sleep. Scaling this down to 96MHz (divide by two) should give much better numbers. Depending on the use-case reducing, the frequency just around CPU sleep should be a viable option. This is described closer under Voltage and Frequency Scaling in the PS.

Best regards,
Jørgen

RE: NRF5340 power consumption issue when QSPI is disabled.

wasan — Sat, 20 Nov 2021 02:20:26 GMT

Hi Jonathan

I tested the device disabled uart in overlay file.But I found the same problem.

SDK Vesion
nRF Connect SDK 1.7.1

Regards

Wasan

RE: NRF5340 power consumption issue when QSPI is disabled.

wasan — Mon, 13 Sep 2021 14:45:48 GMT

Oh, I'm so sorry for the mistake about my image.

This's my nRF5340DK Board

pca10095

0.11.0

2020.45

960173359

I will try to disable UART for test agian.

Regards,

Wasan

RE: NRF5340 power consumption issue when QSPI is disabled.

JONATHAN LL — Mon, 13 Sep 2021 14:03:51 GMT

Hi Wasan,

Seems to me that you are using a nrf52840 DK(PCA10056), and not a nrf53 DK. You said that you did not encounter the same issue on the nrf52840.

If you are using a older DK for the 53 series then you might have a PDK. There are some issues that could cause these type of behavior.

But I recommend that you try to disable UART that are not in use in the .overlay file also.

Regards,
Jonathan

RE: NRF5340 power consumption issue when QSPI is disabled.

wasan — Tue, 07 Sep 2021 03:30:54 GMT

Hi jonathan

This's a my hw version.

PCA10056
V0.9.0
2016.51
683587946

Regards,

Wasan

RE: NRF5340 power consumption issue when QSPI is disabled.

JONATHAN LL — Fri, 03 Sep 2021 10:54:16 GMT

Hi,

What HW are you on, what version of the DK if that is what you are using?

Regards,
Jonathan

RE: NRF5340 power consumption issue when QSPI is disabled.

wasan — Sat, 21 Aug 2021 15:05:55 GMT

Hi,

I disable logging and serial in both core and upgrade sdk from 1.5.0 to 1.6.1 . But I still got the same result.

Initially I did not enable external flash memory. The board has a current consumption of 14uA.



Then I enabled External Flash Memory. The board has a current consumption of 3mA.




And finally, I config cs pin to logic high and uninit qspi. The board has a current consumption of 800uA.

I have attached my source code project file at below.

devzone.nordicsemi.com/.../beacon_5F00_lp.rar

I've tested this with an nRF52840DK board. And I'm not found this problem.

Regards

Wasan

RE: NRF5340 power consumption issue when QSPI is disabled.

JONATHAN LL — Tue, 18 May 2021 08:56:24 GMT

Disabling logging and serial in both cores should yield the best result.

CONFIG_LOG=n

CONFIG_SERIAL=n

Regards,
Jonathan

RE: NRF5340 power consumption issue when QSPI is disabled.

JONATHAN LL — Fri, 14 May 2021 14:28:33 GMT

Hi,

Due to holiday, you should expect some delay in response time until Tuesday 18 of May. Thank you for your patience.
Regards,
Jonathan