1、功能说明

    1、STOP2模式的进入和退出。

2、使用环境

    软件开发环境：KEIL MDK-ARM V5.25
    硬件环境：
        1、基于评估板N32A455VEL7-EVB V1.0开发
        2、MCU：N32A455VEL7

3、使用说明
    
    系统配置；
        1、时钟源：HSE+PLL
        2、时钟频率：144MHz
        3、唤醒源：PA0
               
    使用方法：
        在KEIL下编译后烧录到评估板，接上电流表，上电后发现电流由mA降到了uA级别，
            按下唤醒按键(PA0),电流由回到了mA级别，过了一会又降到uA。

4、注意事项
     在评估功耗的时候，要注意去掉LED去测


1. Function description

     1. Entry and exit of STOP2 mode.

2. Use environment

     Software development environment: KEIL MDK-ARM V5.25
     Hardware environment:
         1. Developed based on the evaluation board N32A455VEL7-EVB V1.0
         2. MCU: N32A455VEL7

3. Instructions for use
    
     System Configuration;
         1. Clock source: HSE+PLL
         2. Clock frequency: 144MHz
         3. Wake-up source: PA0
               
     Instructions:
         After compiling under KEIL, burn it to the evaluation board, connect the ammeter, and find that the current has dropped from mA to uA level after power-on.
             Press the wake-up button (PA0), the current returns to mA level, and then drops to uA after a while.

4. Matters needing attention
      When evaluating power consumption, pay attention to removing the LED to measure