STM32L151 low power consumption problem

chenbingjy

STM32L151 low power consumption problem [Copy link]

My schematic diagram has an indicator light, 10 buttons, and a Bluetooth module. For low power mode, a MOS tube is used to cut off the Bluetooth power supply. Now, when the Bluetooth power supply is cut off, it enters the stop mode. Stop_Mode(); …… void Stop_Mode(void) { /*Enter low power mode*/ LP_Run_Mode(); RCC->APB1ENR|=1<<28; //Enable power clock PWR_VoltageScalingConfig(PWR_VoltageScaling_Range2);//1.5v PWR->CR &= ~(3<<0); //Clear PDDS and LPDSR PWR->CR |= 1<<0; //set LPDSR /* Set SLEEPDEEP bit of Cortex System Control Register */ SCB->SCR |= SCB_SCR_SLEEPDEEP; RCC->APB1ENR &= ~(1<<28); /*Turn off power clock*/ __WFI(); /* Reset SLEEPDEEP bit of Cortex System Control Register */ SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP); } I measured the current and it was about 360uA. Is the power consumption a bit high? Also, after entering low power consumption, the operating frequency seems to be reduced. What's going on? Thank you!

chunyang

Check the device manual according to the low power mode you use to see if it is consistent. If it obviously exceeds the parameters in the device manual, check the peripheral and IO configuration.