Idle current consumption

[mich_x]

What is the current consumption of nRF52480 when idle.

I used power profiler to measure it. But I want to know if it is accurate.

[Sigurd]

Hi,

If you close the UART(E) with app_uart_close(), and stop the scanning(comment the scan_start();, or call sd_ble_gap_scan_stop()) you should see a couple of µA power consumption.

Note that you on the nRF52840-PDK need to cut both SB40 and SB41 to get accurate current measurements.

Note, you need to power cycle the UARTE peripheral after you call app_uart_close() in order stop HFCLK and DMA bus. See this post

So you need to do it like this when you close the UARTE:

err_code  = app_uart_close();
*(volatile uint32_t *)0x40002FFC = 0;
*(volatile uint32_t *)0x40002FFC;
*(volatile uint32_t *)0x40002FFC = 1;

Also remember to disable the log module in sdk_config.h (set NRF_LOG_BACKEND_RTT_ENABLED and NRF_LOG_ENABLED to 0)

[mich_x]

‌‌ ‌‌ ‌‌ ‌‌ ‌‌ ‌‌ ‌‌

int main(void)
{
    timer_init();
    power_init();
    buttons_leds_init();
    db_discovery_init();
    ble_stack_init();
    gatt_init();
    nus_c_init();
	app_uart_close();
    *(volatile uint32_t *)0x40002FFC = 0;
    *(volatile uint32_t *)0x40002FFC;
    *(volatile uint32_t *)0x40002FFC = 1;
    for (;;)
    {
		nrf_pwr_mgmt_run();
    }
}

This is my main. One problem is that I only cut SB40 but not SB41. Would that cause the current a little bigger?