/**
  ******************************************************************************
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  * Copyright (C) 2023 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

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Version history:
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2023-02-16	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：使用CMU单元，生成不同总线的时钟，并通过GPIO引脚输出，使能PLL失锁管理功能。

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测试环境:
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测试用板；
ES-PDS-ES32VF2264

辅助工具：
示波器

辅助软件：
无

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测试步骤：
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1) 编译工程，编译通过后将程序下载到目标芯片；
2) 将程序配置的HSCO对应的引脚连接至示波器相应管脚，观察系统时钟128分频后输出的波形；
3) 上位机切换到逻辑笔标签页，勾选相应通道，选择“开始”；
4) 在线调试，将g_sysclk、g_pclk加入Watch Window，运行程序；

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注意：
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1) 测试板与示波器需共GND。
2) sysclk: fclk / 2     = 36MHz
3) pclk:   sysclk / 2   = 18MHz
4) HSCO:   sysclk / 128 = 281.25kHz
5) PLL失锁管理：设置PLL失锁后自动切换到HRC，待重新锁定后切回PLL，PLL失锁后产生NMI异常

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System clock:
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PLL 72MHz(PLL参考时钟 HOSC8M)

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Pin connection: 
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HSCO ---- PA8[GPIO_FUNC_4]
