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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HSI， （ ）
Function descriptions:
This sample configures the system clock to use the HSI (High-Speed Internal)
clock source and outputs it through the MCO (PA08) pin.
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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. 使用示波器监测PA08引脚上的频率， ；
Example execution steps:
1. Compile and download the program to the MCU and run it;
2. Use an oscilloscope to monitor the frequency on the PA08 pin and check if
it matches the configured HSI frequency.
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注意事项：
Notes:
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