RE: nrf52 with LDO setup consum 10 uA

Amigo — Tue, 02 Oct 2018 03:34:12 GMT

No, it seems to be like that! The current is 5 - 9 uA

RE: nrf52 with LDO setup consum 10 uA

Beike — Fri, 28 Sep 2018 08:52:36 GMT

I has meet the same problem, have you solved it? can anyone help me?

RE: nrf52 with LDO setup consum 10 uA

Amigo — Fri, 23 Mar 2018 06:38:00 GMT

Dont you have any idea about my ansver below?

RE: nrf52 with LDO setup consum 10 uA

Amigo — Fri, 23 Mar 2018 06:37:09 GMT

Dont you have no idea about my ansver below!?

RE: nrf52 with LDO setup consum 10 uA

Amigo — Mon, 19 Mar 2018 14:40:17 GMT

Here is board schematics overhead.

My GPIO setting and clock setting functions:

bool clocks_set(uint8_t source, bool state )
{
	NRF_CLOCK->CTIV = 16;
	if(source == XTAL_HF)
	{
		if(state == true)
		{
				#if defined (NRF51822)
						NRF_CLOCK->XTALFREQ = CLOCK_XTALFREQ_XTALFREQ_16MHz << CLOCK_XTALFREQ_XTALFREQ_Pos;
				#endif
				NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
				NRF_CLOCK->TASKS_HFCLKSTART = 1;
				while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
		}
		else if(state == false){
			// если генератор запущен
			NRF_CLOCK->TASKS_HFCLKSTOP = 1;
			__NOP;
		}
		return (bool)(NRF_CLOCK->HFCLKSTAT >> CLOCK_HFCLKSTAT_STATE_Pos);
	}
	else if(source == XTAL_LF)
	{
		if(state == true)
		{
			// если генератор не запущен
			NRF_CLOCK->LFCLKSRC = CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos;
			NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
			NRF_CLOCK->TASKS_LFCLKSTART = 1;
			while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0);
		}
		else if(state == false){
			NRF_CLOCK->TASKS_LFCLKSTOP = 1;
			__NOP;
		}
		return (bool)(NRF_CLOCK->LFCLKSTAT >> CLOCK_LFCLKSTAT_STATE_Pos);
	}
}
/*****************************************************************************************************/
void gpio_init( void )
{
	uint32_t err_code;
	//bsp_board_leds_init();
	NVIC_DisableIRQ(GPIOTE_IRQn);	
	NRF_GPIOTE->EVENTS_PORT = 0;
    #if defined (NRF51822)
	#elif defined (NRF52832)
		// Disable NFC pins
    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
    NRF_UICR->NFCPINS = UICR_NFCPINS_PROTECT_Disabled << UICR_CUSTOMER_CUSTOMER_Pos;
    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren<< NVMC_CONFIG_WEN_Pos;
	#endif
	// Светодиод - LED
	nrf_gpio_cfg_output(LED_0); 
	// Кнопка - Button
	nrf_gpio_cfg_sense_input(BUTTON, GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos, NRF_GPIO_PIN_SENSE_LOW); 
	// Геркон - Gerkon
	nrf_gpio_cfg_sense_input(GERKON, GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos, NRF_GPIO_PIN_SENSE_LOW); 
	NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_PORT_Enabled << GPIOTE_INTENSET_PORT_Pos;   
}

There are no serious difference between nrf51822 and nrf52832 mcu code. But when i use nrf51 current consuption is 1.5 - 2 ua against 10 uA with nrf52.

Also i noticed that in a low power mode ( __WFE(); instruction) HF generator stay active and sourced by RC gain. I thought it will inactive when LF (32768 crystal) using in LPM.

I cant use power off, becouse i need gpio (gerkon) interrupt on LOW and HIGH level both (switching between low and high).

I measure current consumption with my measuring tool with 0.1 uA resolution in LPM mode only. In RX & TX modes it consumes 14 - 20 mA as it is in datasheet.

RE: nrf52 with LDO setup consum 10 uA

haakonsh — Mon, 19 Mar 2018 12:33:21 GMT

Hey Roman,

The nRF52 series uses LDO in refresh mode in sleep/system OFF. I expect you to get 0.3µA in system off. How do you measure the current consumption? What else is on your board that can draw current?

Håkon.