/**
  @page PWR_STOP_RegulatorOn PWR STOP regulator on example
  
  @verbatim
  ****************** (C) COPYRIGHT 2023 Megawin Technology *******************
  * @file    PWR/PWR_STOP_RegulatorOn/readme.txt 
  * @author  Megawin Application Team
  * @version V0.0.4
  * @date    16-June-2023
  * @brief   Description of the PWR PWR_STOP_RegulatorOn example.
  ******************************************************************************
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, MEGAWIN SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
  * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM
  * THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  ******************************************************************************
   @endverbatim

@par Example Description 

This example describes how to enters the STOP regulator on mode and wake-up from this mode using external interrupt.

In this example：
1. LED2 turn on, LED1 turn off; LED1 toggling.
2. Press KEY2 to enter STOP regulator on mode, LED1 stops toggling.
3. Wake-up the STOP regulator on mode in external interrupt by pressing a button connected to PA0 pin.
4. When enters the STOP regulator on mode,the RCC configuration is not kept,so there is need to configure the RCC.
5. LED1 toggling.


@par Directory contents 

  - PWR/PWR_STOP_RegulatorOn/PWR_STOP_RegulatorOn.uvprojx       MDK5 project file
  - PWR/PWR_STOP_RegulatorOn/PWR_STOP_RegulatorOn.uvoptx        MDK5 project options file
  - PWR/PWR_STOP_RegulatorOn/JLinkSettings.ini                  Jlink settings file
  - PWR/PWR_STOP_RegulatorOn/main.c                             Main program


@par Hardware and Software environment 

  - Hardware environment
    - HSE crystal is 8MHz
    - The chip pins are connected as follows：
      - PB10 pin is connected to LED1
      - PB11 pin is connected to LED2
      - PA0 pin is connected to KEY1
      - PA1 pin is connected to KEY2
      - PA2 pin is connected to KEY3


@par How to use it ? 

In order to make the program work, you must do the following :
 - Open PWR_STOP_RegulatorOn.uvprojx from this example folder by Keil MDK5
 - Rebuild all files and load your image into target memory
 - Run the example 
   
 * <h3><center>&copy; COPYRIGHT 2023 Megawin Technology</center></h3>
 */
