High power consumption in shutdown

RE: High power consumption in shutdown

Simonr — Mon, 25 Oct 2021 05:48:54 GMT

This case is nearly 2 years old. Could you please create a case of your own where you describe this issue in detail, and a support engineer will be assigned to it. Feel free to link to this case if you find it relevant. What you're describing seems very strange indeed.

Best regards,

Simon

RE: High power consumption in shutdown

OPQ — Fri, 22 Oct 2021 10:39:00 GMT

Sorry for my bad describe.

Does the workaround only work if you do not disable the TWI first?

No, I mean if I did not disable and uninit the TWI ,the power consumption will not be abnormal.

RE: High power consumption in shutdown

Simonr — Fri, 22 Oct 2021 10:32:06 GMT

Does the workaround only work if you do not disable the TWI first? That seems very strange. This case is nearly 2 years old. Could you please create a case of your own where you describe this issue in detail, and a support engineer will be assigned to it.

Best regards,

Simon

RE: High power consumption in shutdown

OPQ — Fri, 22 Oct 2021 09:45:59 GMT

Test in SDK 14.2.

RE: High power consumption in shutdown

OPQ — Fri, 22 Oct 2021 09:37:50 GMT

Hi Simon,

I use TWI0，and also use this workaround but power consumption still about 400uA,it's only 5uA if did not disable twi.

static void i2c_diable_uninit(void)
{
    nrf_drv_twi_disable(&m_twi);

    nrf_drv_twi_uninit(&m_twi);

    nrf_gpio_cfg_default(APS_SCL_PIN);
    nrf_gpio_cfg_default(APS_SDA_PIN);
    nrf_gpio_cfg_default(APS_CS_PIN);
    nrf_gpio_cfg_default(APS_SA0_PIN);


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

RE: High power consumption in shutdown

Simonr — Fri, 17 Jan 2020 13:57:54 GMT

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