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                                样例使用说明
                             Sample Description
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功能描述：
此样例配置系统时钟为HSE，并通过MCO1（PA8）引脚输出。

Function descriptions:
This sample configures the system clock as HSE and outputs it through the MCO1 
(PA8) pin.
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测试环境：
测试用板：PY32MD530_STK
MDK版本： 5.28

Test environment:
Test board: PY32MD530_STK
MDK Version: 5.28
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使用步骤：
1. 编译下载程序到MCU，并运行；
2. 按下用户按键；
3. 用示波器监测PA8引脚上的频率，观察到和HSE频率一致；

Example execution steps:
1.Compile and download the program to the MCU and run it.
2.Press the user button.
3.Use an oscilloscope to monitor the frequency on the PA8 pin and observes that
it matches the HSE frequency.
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注意事项：

Notes:

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