================================================================================
                                样例使用说明
                             Sample Description
================================================================================
功能描述：
此样例演示了MCU进入DeepSleep模式和串口接收中断唤醒功能。

Function descriptions:
This sample demonstrates the MCU's entry into the DeepSleep mode and the function 
of waking up by the serial port receive interrupt.
================================================================================
测试环境：
测试用板：DPM32M030_REV_A
MDK版本： 5.28

Test environment:
Test board: DPM32M030_REV_A
MDK Version: 5.28
================================================================================
使用步骤：
1. 编译下载程序到MCU，并运行。
2. MCU进入DeepSleep模式，串口发送消息至MCU可唤醒。

Example execution steps:
1. Compile and download the program to MCU, and run it.
2. The MCU enters the low-power mode and can be woken up by sending messages to 
it via the serial port.
================================================================================
注意事项：
UART引脚如下：
UART_Tx    -> PA9
UART_Rx    -> PA10

Notes:
The UART pins are as follows:
UART_Tx    -> PA9
UART_Rx    -> PA10

================================================================================