STM32WL3R high current consumtion in deep stop

[sbelcatronic]

Hello,

On the STM32WL3R microcontroller, when deep stop mode is activated, the current consumption is about 1.3 mA, which is a very high value compared to the 0.8 µA specified in the datasheet. In contrast, when I activate shutdown mode in the same firmware, I measure the correct current consumption of about 14 nA.

This is the code used to enter deep stop mode:

static void EnterDeepStop(void)
{
	__HAL_MRSUBG_STROBE_CMD(CMD_SABORT);
	HAL_MRSubG_MspDeInit();	//deinizializza il modulo radio
	HAL_TIM_Base_DeInit(&htim2);
	HAL_SuspendTick();

	HAL_PWREx_DisableDEEPSTOP2();
	//HAL_PWREx_EnableDEEPSTOP2();

	ConfigureGPIOForStop();
	//LL_PWR_DisableBORinSDN();

	HAL_PWREx_DisableGPIOPullUp(PWR_WAKEUP_PORTB,
								PWR_GPIO_BIT_13|
								PWR_GPIO_BIT_14);

	HAL_PWREx_EnableGPIORetention();	//abilia GPIO retenction
	HAL_PWREx_DisableSRAMRetention();

	HAL_PWREx_GetClearInternalWakeUpLine();

	HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PORTA,
							PWR_WAKEUP_PIN0|PWR_WAKEUP_PIN8|PWR_WAKEUP_PIN9|PWR_WAKEUP_PIN11,
							PWR_WUP_FALLEDG );
	HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PORTA,
							PWR_WAKEUP_PIN0|PWR_WAKEUP_PIN8|PWR_WAKEUP_PIN9|PWR_WAKEUP_PIN11,
							PWR_WUP_RISIEDG );

	//__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF_ALL);
	__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUFA0|PWR_FLAG_WUFA8|PWR_FLAG_WUFA9|PWR_FLAG_WUFA11);


	sConfigDEEPSTOP.deepStopMode = PWR_DEEPSTOP_WITH_SLOW_CLOCK_ON;
	HAL_PWR_ConfigDEEPSTOP(&sConfigDEEPSTOP);

	HAL_PWR_EnterDEEPSTOPMode();

	while(1);

}

in function ConfigureGPIOForStop(); I reconfigure the I/O pin for reduce currente consuptio (I set all the PIN in Analog and activate Pull up resistor as requared in my hardware.  

void ConfigureGPIOForStop(void)
{
	GPIO_InitTypeDef GPIO_InitStruct = {0};

	__HAL_RCC_GPIOA_CLK_ENABLE();
	__HAL_RCC_GPIOB_CLK_ENABLE();

	GPIO_InitStruct.Pin = TP1_Pin| GPIO_PIN_2 | GPIO_PIN_3| // SWDIO, SWCLK
			GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7 | GPIO_PIN_10 |
			GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
	GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

//	GPIO_InitStruct.Pin = TP1_Pin;
//	GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
//	GPIO_InitStruct.Pull = GPIO_NOPULL;
//	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

	GPIO_InitStruct.Pin = TP2_Pin|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|
			GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|
			GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
	GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

//	GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_12;
//	GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
//	GPIO_InitStruct.Pull = GPIO_PULLUP;
//	HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

	HAL_PWREx_EnableGPIOPullUp(PWR_GPIO_A,
	                         PWR_GPIO_BIT_0|
							 //PWR_GPIO_BIT_1|
							 //PWR_GPIO_BIT_2|
							 //PWR_GPIO_BIT_3|
							 //PWR_GPIO_BIT_4|
							 //PWR_GPIO_BIT_5|
							 //PWR_GPIO_BIT_6|
	                         //PWR_GPIO_BIT_7|
	                         PWR_GPIO_BIT_8|
	                         PWR_GPIO_BIT_9|
							 //PWR_GPIO_BIT_10|
	                         PWR_GPIO_BIT_11
							 //PWR_GPIO_BIT_12|
							 //PWR_GPIO_BIT_13|
	                         //PWR_GPIO_BIT_14|
	                         //PWR_GPIO_BIT_15
							 );
	    HAL_PWREx_DisableGPIOPullDown(PWR_GPIO_A,
	    					 PWR_GPIO_BIT_0|
							 PWR_GPIO_BIT_1|
							 PWR_GPIO_BIT_2|
							 PWR_GPIO_BIT_3|
							 PWR_GPIO_BIT_4|
							 PWR_GPIO_BIT_5|
							 PWR_GPIO_BIT_6|
							 PWR_GPIO_BIT_7|
							 PWR_GPIO_BIT_8|
							 PWR_GPIO_BIT_9|
							 PWR_GPIO_BIT_10|
							 PWR_GPIO_BIT_11|
							 PWR_GPIO_BIT_12|
							 PWR_GPIO_BIT_13|
							 PWR_GPIO_BIT_14|
							 PWR_GPIO_BIT_15
							);
	    HAL_PWREx_DisableGPIOPullDown(PWR_GPIO_B,
	    					 PWR_GPIO_BIT_0|
							 PWR_GPIO_BIT_1|
							 PWR_GPIO_BIT_2|
							 PWR_GPIO_BIT_3|
							 PWR_GPIO_BIT_4|
							 PWR_GPIO_BIT_5|
							 PWR_GPIO_BIT_6|
							 PWR_GPIO_BIT_7|
							 PWR_GPIO_BIT_8|
							 PWR_GPIO_BIT_9|
							 PWR_GPIO_BIT_10|
							 PWR_GPIO_BIT_11|
							 PWR_GPIO_BIT_12|
							 PWR_GPIO_BIT_13|
							 PWR_GPIO_BIT_14|
							 PWR_GPIO_BIT_15
							 );
	    HAL_PWREx_EnableGPIOPullUp(PWR_GPIO_B,
	    					 //PWR_GPIO_BIT_0|
							 //PWR_GPIO_BIT_1|
							 //PWR_GPIO_BIT_2|
							 //PWR_GPIO_BIT_3|
							 //PWR_GPIO_BIT_4|
							 //PWR_GPIO_BIT_5|
							 PWR_GPIO_BIT_6|
							 //PWR_GPIO_BIT_7|
							 //PWR_GPIO_BIT_8|
							 //PWR_GPIO_BIT_9|
							 //PWR_GPIO_BIT_10|
							 //PWR_GPIO_BIT_11|
							 PWR_GPIO_BIT_12
							 //PWR_GPIO_BIT_13|
							 //PWR_GPIO_BIT_14
							 //PWR_GPIO_BIT_15
							 );
}

The deep stop mode lock work properly and the microcontroller wakeup from pins as I expected.

Any suggestions to solve this problem?

Best regards,

[Gyessine]

Hello @sbelcatronic 
Just to be sure, did you at any time tried to start a debug session in the project?
If so, manually clear the low-power-mode debug bits before entering deep-stop mode. This condition might be the root cause of the issue.

  CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STOP);
  CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);

and ensure to disable debug in low power modes option in debug configuration.

BR
Gyessine