（Low-power mode wakeup）

关于STM32F的待机模式(Standby mode)

The Standby mode is used to achieve the lowest power consumption. The internal voltage regulator is switched off so that the entire 1.2 V domain is powered off. The PLL, the HSI RC and the HSE crystal oscillators are also switched off. After entering Standby mode, the SRAM and register contents are lost except for registers in the backup domain when selected.

待机模式用于实现最低功耗。内部稳压器关闭，以便关闭整个1.2 V域。PLL、HSI RC和HSE晶体振荡器也处于关断状态。进入待机模式后，除备份域中的寄存器外，SRAM和寄存器内容将丢失。

The devices exit the Standby mode when an external reset (NRST pin), an IWDG reset, a rising edge on the WKUP pin, or an RTC alarm/ wakeup/ tamper/time stamp event occurs. Standby mode is not supported when the embedded voltage regulator is bypassed and the 1.2 V domain is controlled by an external power.

当发生外部复位（NRST引脚）、IWDG复位、WKUP引脚上的上升沿或RTC警报/唤醒/篡改/时间戳事件时，设备退出待机模式。当嵌入式稳压器被旁路且1.2 V域由外部电源控制时，不支持待机模式。