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N32L43XML-STB V1.0开发
        2、MCU：N32L436MBL7


3、使用说明
    
    系统配置；
        1、时钟源：HSE+PLL
        2、时钟频率：108MHz(RUN Mode)/0MHz(STOP2 Mode)
        3、串口配置：
            - 串口为USART2（TX：PA9  RX：PA10）:
            - 数据位：8
            - 停止位：1
            - 奇偶校验：无
            - 波特率： 115200 

    使用方法：
        在KEIL下编译后烧录到评估板，串接电流表,PC串口工具连接上评估板，串口上位机打印:
        “ MCU Prepare Enter Stop2 Mode Core Stop Run”   MCU准备进入STOP2模式电流表测量得电流变小,
        按下唤醒按键PA0,随后打印:"MCU Run In Run Mode Sysclock From PLL(108MHz)" 
        MCU从STOP2模式切换到运行模式，电流表测得电流变大，如此重复上述实验现象。                    


4、注意事项
    ①在评估功耗的时候，要注意去掉LED去测
    ②SRAM1和SRAM2可配置


1. Function description
    1. Enter and exit STOP2 mode.

2. Use environment
    Software development environment: KEIL MDK-ARM V5.25
    Hardware environment:
	1. Development based on evaluation board N32L43XML-STB V1.0
	2. MCU: N32L436MBL7

3. Instructions for use    
    System configuration;
	1. Clock source: HSE+PLL
	2. Clock frequency: 108MHz(RUN Mode)/0MHz(STOP2 Mode)
	3. Serial port configuration:
	    - Serial port: USART1 (TX: PA9 RX: PA10) :
	    - Data bit: 8
	    - Stop bit: 1
	    - Parity check: None
	    - Baud rate: 115200
               
    Instructions:
	After compiling in KEIL, burn it to the evaluation board, connect ammeter in series, connect the PC serial port tool to the evaluation board, and print it on the serial port PC: "MCU Prepare Enter Stop2 Mode Core Stop Run" MCU Prepare to Enter Stop2 Mode the current measured by the ammeter decreases, Press the wake up button PA0, and then print :"MCU Run In Run Mode Sysclock From PLL(108MHz)" when MCU switches From STOP2 Mode to operation Mode, the current measured by the ammeter increases, thus repeating the above experimental phenomenon.

4. Attention
    ①When evaluating power consumption, we should pay attention to removing LED to measure
    ②SRAM1 and SRAM2 are configurable

