nrf52832 sleep mode power large

[rc]

Hi: I am using SDK14.0 S132 for nrf52832 , i found it's sleep mode power comsumption large than 5mA . I am using internal LDO and external power is 3.7V li-battery cross a diode to reduce Vottage to 3.5V.

my enter sleep mode preprocess as follows:

void enterSystemOff(void)

{

    shutdown_all_leds();
disable_ring();
uninit_rotation_gpio();
nrf_drv_rng_uninit();
nrf_drv_ppi_uninit();
mpu9520_twi_uninit();
nrf_drv_saadc_uninit();
app_uart_close();

uninit_beep_timer();
uninit_public_timer();
uninit_saadc_timer();

sleep_mode_enter();

NRF_POWER->SYSTEMOFF = 1; 

}

anyone has solutions, thank you !

[Jørgen Holmefjord]

Hi,

It sounds like the CPU is not able to go to sleep. Please make sure you are power cycling the board after programming, and that you do not have any RTT connections enabled, as this will cause the chip to be in debug-mode.

If you are doing any floating point calculations in your code, you should also make sure you apply this errata workaround.

Best regards,

Jørgen