/**
  ******************************************************************************
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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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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2022-03-08	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：使用PMU进行单电池供电系统低功耗设计，电池供电的系统通常为休眠状态，
并具备若干唤醒源，本例程唤醒端口为PD2，唤醒后翻转一次LED电平再次进入休眠。
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测试环境:
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测试用板；
ES-PDS-ES32VF2264

辅助工具：
多功能接口转换工具ES-Bridge

辅助软件：
ES-Bridge上位机软件

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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) 将测试用板对应的VDD和GND引脚分别连接到ES-Bridge的VCC和GND；
3) 将测试用板与ES-LINK II的连接断开，由ES-Bridge供电；
4) 按下测试用板的RESET键；
5) 上位机切换到功耗检测标签页，选择“开始”进行功耗监测；
6) PD2检测到上升沿时，MCU唤醒，对PA15进行一次电平翻转后MCU继续进入低功耗状态；

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注意：
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1) 测试板与ES-Bridge需共GND。
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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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PMU_EXTI     ---- PD2[GPIO_FUNC_1]
LED          ---- PA15[GPIO_FUNC_1]
