SPI NOR flash in power down mode

Question

Hello,

I have added a flash to my project. Unfortunately it is consuming a rather large amount of current (600uA). I am looking into setting the chip to dpd mode.

&spi1
{
    compatible = "nordic,nrf-spi";
    status = "okay";

    cs-gpios = < &gpio0 16 GPIO_ACTIVE_LOW >;

    pinctrl-0 = <&spi1_default>;
    pinctrl-1 = <&spi1_sleep>;
    pinctrl-names = "default", "sleep";

    mx25v2033fzui: mx25v2033fzui@0
    {
        compatible = "jedec,spi-nor";
        label = "MX25V2033FZUI";
        jedec-id = [c2 23 14];
        reg = <0>;
        spi-max-frequency = <1000000>;
        wp-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
        size = <0x1000000>;
        has-dpd;
        t-enter-dpd = <10000>;
        t-exit-dpd = <35000>;
    };
};


&mx25v2033fzui{
    partitions{
        compatible="fixed-partitions";
        #address-cells=<1>;
        #size-cells=<1>;

        slot1_partition: partition@0 {
            label = "image-1";
            reg = <0x00000000 DT_SIZE_K(440)>;
        };

        /** 6e000  == 440K */
        lfs1_part: partition@6e000 {
            label = "storage";
            reg = <0x6e000 DT_SIZE_K(584)>;
        };

    };
};

Flash related KCONFIGs:

CONFIG_FLASH=y
CONFIG_FLASH_MAP=y

CONFIG_SPI_NOR_IDLE_IN_DPD=y

CONFIG_SPI=y
CONFIG_SPI_NOR=y
CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096

Note: The flash IC is working no issues, just looking into low power.

Unfortunately, setting "CONFIG_SPI_NOR_IDLE_IN_DPD" did not work. Any other suggestions to look into?

Shahin97 · Accepted Answer

Solved. Issue with WP pin pull up. Flash IC has internal pull up.

SPI NOR flash in power down mode

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