wenkong_junshi/Examples/PMU/Standby_wakeup_RTC/readme.txt

/*!
    \file    readme.txt
    \brief   description of wakeup from standby by RTC alarm demo

    \version 2021-12-30, V1.0.0, firmware for GD32F30x
*/

/*
    Copyright (c) 2021, GigaDevice Semiconductor Inc.

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*/

    This demo is based on the GD32307C-EVAL-V1.1 board, it explains how to configure the
RTC module to wakeup MCU from standby mode through RTC alarm interrupt.
    Select RCU_IRC40K as RTC clock source. The RTC alarm interval is configured as 3s. 
After start-up, the LED2~LED5 is on. After 2s, MCU enter standby mode, all LEDs turn 
off. After 3 seconds, MCU will be wakeuped from standby mode by RTC alarm interrupt, a 
power-on reset occurs and the MCU will execute instruction code from the 0x00000000 address.