/**
  **************************************************************************
  * @file     wdt_standby/readme.txt 
  * @version  v2.0.5
  * @date     2022-05-20
  * @brief    readme
  **************************************************************************
  */

  this demo is based on the at-start board, in this demo, the wdt wakeup mcu 
  from standby mode. if the chip is wakeup from standby mode by wdt, led4 
  will be on.for more detailed information. please refer to the application
  note document AN0045.
