Introduction to STM32 low power mode-EEWORLD

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The STM32F10xxx has three low-power modes:

●Sleep mode (Cortex?-M3 core stops, peripherals are still running)
●Stop mode (all clocks are stopped)
●Standby mode (1.8V power supply is turned off)

When the clock frequency is 72MHz and the code is executed from the flash memory, the STM32 consumes 36mA, which is the lowest power consumption product on the 32-bit market, equivalent to 0.5mA/MHz.

When powered on, the internal HSI clock 8M is used by default, which is about 10mA after testing. The standby mode can achieve the lowest power consumption of the system, and the current consumption can be reduced to two microamperes.

In standby mode, all I/O pins are in high impedance state, except for the following pins:
● Reset pin (always valid)
● TAMPER pin when set as anti-intrusion or calibration output
● Wake-up pin when enabled

Introduction to STM32 low power mode - ╄→ Wind, can't blow away - ╄→ Wind, can't blow away

/*Button GPIOB9 goes to sleep, WKUP pin (GPIOA0) wakes up, GPIOD3-LED flashes 200ms*/
int main(void)
{
/* System Clocks Configuration **********************************************/
RCC_Configuration();

GPIO_Configuration();

/* Enable PWR and BKP clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);

/* Enable WKUP pin */
PWR_WakeUpPinCmd(ENABLE);

/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);

//RTC_Configuration();

EXIT_Configuration();

NVIC_Configuration();

SysTick_Config(SystemFrequency / 1000 *200 ); //200ms

while (1)
{

Delay(0xAFFFF);

}
}

Keywords：STM32 Reference address：Introduction to STM32 low power mode

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