High current consumption on setting pin configuration

[Etienne]

Hi everybody, 

I work on custom board with the SDK 15.2.0 and the SoftDevice S140. 

I work on the ble_sdk_app_template example. I tested it on the nrf52840 DK and it work well. I have 1.5µA average current consumption in system off mode. I did the same on my custom borad and it work well. I have 44µA average current consumption in system off mode due to my board that cosumes about 40µA. I set my pinout configuration in custom_board.h file and I have the same average current consumption. But when I try to configure the pins I have a high current consumption on the ChipSelect pin of my board. 

Here an example of the pin configuration of the flash pin :

    /*** - FLASH pin config ***/
    nrf_gpio_cfg(
        IS25LP_CS,
        NRF_GPIO_PIN_DIR_OUTPUT,
        NRF_GPIO_PIN_INPUT_DISCONNECT,
        NRF_GPIO_PIN_NOPULL,
        NRF_GPIO_PIN_S0S1,
        NRF_GPIO_PIN_NOSENSE);
    nrf_gpio_cfg(
        IS25LP_WP,
        NRF_GPIO_PIN_DIR_OUTPUT,
        NRF_GPIO_PIN_INPUT_DISCONNECT,
        NRF_GPIO_PIN_NOPULL,
        NRF_GPIO_PIN_S0S1,
        NRF_GPIO_PIN_NOSENSE);
    nrf_gpio_cfg(
        IS25LP_HOLD,
        NRF_GPIO_PIN_DIR_OUTPUT,
        NRF_GPIO_PIN_INPUT_DISCONNECT,
        NRF_GPIO_PIN_NOPULL,
        NRF_GPIO_PIN_S0S1,
        NRF_GPIO_PIN_NOSENSE);
        

But the average current consumed goes to 84µA.
Is there any explanation for this increase of the current comsumption? 

Thank you in advance for your response.

EtienneD

[Simonr]

Hi Etienne

Please check out the Troubleshooting section in this post, as it describes quite a few common reasons why configured pins might draw extra current. What pins are you trying to set the Flash pins to exactly? Did you follow the configuration "guide" in the Infocenter when configuring these pins?

Best regards,

Simon

[Etienne]

Hi Simonr, 

Thank you for response. 
I will read this post to understand the right configuration pin.
I'm trying to set the ChipSelect, WriteProtec and Hold pin of the flash. 

I don't use QSPI, just SPI because I have others components on the SPI bus.

Best regards, 

Etienne