/*!
    \file    readme.txt
    \brief   description of the low voltage detector demo

    \version 2025-07-31, V3.3.2, firmware for GD32F4xx
*/

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*/

  This example is based on the GD32450-EVAL-V1.1 board, it shows how to use low voltage detector. 
If VDD/VDDA is higher or lower than the LVD threshold, then a lvd event will occur. The event 
is internally connected to the EXTI line 16 and can generate an interrupt if enabled through 
the EXTI registers. Use external power connect 3.3v pin and GND pin of the board, adjust 
voltage higher or lower than the LVD threshold 3.1v, LED1 will toggle.
 