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样例使用说明
Sample Description
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功能描述：
此样例演示了sleep模式下，
Function descriptions:
This sample demonstrates the GPIO wake-up feature in sleep mode.
When the program starts running, the LED will be on. Press the button, and the
LED will turn off, entering sleep mode. When a falling edge is detected on PA06,
the program will exit sleep mode. The LED will toggle at intervals of 500ms.
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测试环境：
测试用板：
MDK版本：
IAR版本：
GCC版本：
Test environment:
Test board: PY32F403_STK
MDK Version: 5.28
IAR Version: 9.20
GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10
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使用步骤：
1. 编译下载程序到MCU， ；
2. LED灯亮， ， ， ；
3. 在PA06上产生一个下降沿， ；
4. LED以500ms的间隔进行翻转。
Example execution steps:
1. Compile and download the program to the MCU and run it;
2. The LED will be on initially. Press the button, and the LED will turn off,
entering sleep mode;
3. Generate a falling edge on PA06, and the program will exit sleep mode;
4. The LED will toggle at intervals of 500ms.
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注意事项：
Notes:
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