High power consumption in shutdown

[Sparqqling]

The device has high power consumption when in shutdown, around 0,5mA. It uses SPI and TWI in normal operation but I have implemented the work around according the errata but still the problem persist. Am I missing something here?

    *(uint32_t *)0x40003FFC = 0;
    *(uint32_t *)0x40003FFC;
    *(uint32_t *)0x40003FFC = 1;

    *(uint32_t *)0x40004FFC = 0;
    *(uint32_t *)0x40004FFC;
    *(uint32_t *)0x40004FFC = 1;

    *(uint32_t *)0x40023FFC = 0;
    *(uint32_t *)0x40023FFC;
    *(uint32_t *)0x40023FFC = 1;


    nrf_drv_twi_disable(&m_twi_master);
    nrf_drv_twi_uninit(&m_twi_master);

[Simonr]

Hi

Which of the SPI/TWI are you using in your project? Have you turned the TWI/SPI off and back on using the power registers after it has been disabled, as the workaround suggests? For example uninitializing it like this should suffice:

nrf_drv_twi_uninit(&m_twi);
*(volatile uint32_t *)0x40003FFC = 0;
*(volatile uint32_t *)0x40003FFC;
*(volatile uint32_t *)0x40003FFC = 1; 

Best regards,

Simon

[OPQ]

Test in SDK 14.2.