RE: nRF52832 after few minute of power up MCU reset itself. (reset reason:0x10000)

bjorn-spockeli — Wed, 21 Nov 2018 09:28:35 GMT

Hi Daehyeon Kim

the ble_app_uart example will call the following function

static void sleep_mode_enter(void)
{
    uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    APP_ERROR_CHECK(err_code);

    // Prepare wakeup buttons.
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);

    // Go to system-off mode (this function will not return; wakeup will cause a reset).
    err_code = sd_power_system_off();
    APP_ERROR_CHECK(err_code);
}

when the nRF52832 has been advertising for 180 seconds(i.e. no connection has been made within 180 seconds) or if Button 1 is pressed when the device is advertising. The sleep_mode_enter() configures Button 1 as a wakeup button and then put the nRF52832 in System OFF mode. In order to wake up the chip from this mode, the user must push Button 1 to generate the Detect signal, which in turn wakes up the chip. A wakeup from System OFF will reset the chip, see Reset behavior.

Best regards

Bjørn