Low power on spi_nor with nrf5340

RE: Low power on spi_nor with nrf5340

Sigurd — Thu, 31 Aug 2023 14:09:34 GMT

Great! Thanks for confirming!

RE: Low power on spi_nor with nrf5340

Seb-labs — Thu, 31 Aug 2023 14:02:28 GMT

Ok, it seems to work. Tks

RE: Low power on spi_nor with nrf5340

Sigurd — Thu, 31 Aug 2023 13:13:41 GMT

Hi,

We have done some fixes in the lower-level SPIM driver. The issue with increased power on spi4 for the nRF5340 should already be fixed on the sdk-nrf main branch. It will be part of the next nRF Connect SDK release.

As a test, you could perhaps try to replace the nrfx_spim.c file with the latest one from main: https://github.com/zephyrproject-rtos/hal_nordic/blob/master/nrfx/drivers/src/nrfx_spim.c

RE: Low power on spi_nor with nrf5340

Seb-labs — Wed, 30 Aug 2023 15:37:42 GMT

No, there is not the same behaviour with spi3: without need of pm device runtime, the consumation is around 8uA.

For testing, I added this overlay:

&spi4 {
    status = "disabled";
};
/delete-node/ &mx25r64;
&spi3 {
	compatible = "nordic,nrf-spim";
	status = "okay";
	pinctrl-0 = <&spi4_default>;
	pinctrl-1 = <&spi4_sleep>;
	pinctrl-names = "default", "sleep";
	cs-gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
	mx25r64: mx25r6435f@0 {
		compatible = "jedec,spi-nor";
		reg = <0>;
		spi-max-frequency = <33000000>;
		jedec-id = [c2 28 17];
		sfdp-bfp = [
			e5 20 f1 ff ff ff ff 03 44 eb 08 6b 08 3b 04 bb
			ee ff ff ff ff ff 00 ff ff ff 00 ff 0c 20 0f 52
			10 d8 00 ff 23 72 f5 00 82 ed 04 cc 44 83 68 44
			30 b0 30 b0 f7 c4 d5 5c 00 be 29 ff f0 d0 ff ff
		];
		size = <67108864>;
		has-dpd;
		t-enter-dpd = <10000>;
		t-exit-dpd = <5000>;
	};
};

RE: Low power on spi_nor with nrf5340

Sigurd — Wed, 30 Aug 2023 14:16:28 GMT

Hi,

[quote userid="74830" url="~/f/nordic-q-a/103292/low-power-on-spi_nor-with-nrf5340"]When doing this, power consumation is going from 8uA to 1mA.[/quote]

Could you test with spi3 instead of spi4, and see if you see the same behavior with spi3?