那么单片机就会执行复位操作。另外，如果该引脚一直处于高电平植入状态，那

Then the microcontroller will perform a reset operation. In addition, if the pin has been implanted at a high level, the microcontroller will continue to perform a reset operation. For the reset circuit, it is divided into two modes: automatic reset circuit and manual reset circuit. The automatic reset operation is mainly completed by the charge and discharge function of the capacitor. When the rise time of the voltage is less than 1ms, the single chip microcomputer can complete the automatic reset . <br>In addition to power-on reset, sometimes you need to manually reset the button. This design is to use the button to manually reset. There are two types of manual reset: level mode and pulse mode. Among them, the level reset is achieved by connecting the RST (9) terminal with the power supply Vcc. The block diagram of the level reset of this design is shown in the following 3-4:

那么单片机就会执行复位操作。另外，如果该引脚一直处于高电平植入状态，那么单片机内部将不断执行复位操作。对于复位电路而言，它分为自动复位电路和手动复位电路两种模式，自动复位操作主要是通过电容的充放电功能来完成的，当电压的上升时间小于1ms时，单片机就可以完成自动复位。<br>除了上电复位外，有时还需要按键手动复位。本设计就是用的按键手动复位。按键手动复位有电平方式和脉冲方式两种。其中电平复位是通过RST(9)端与电源Vcc接通而实现的。本设计的电平复位框图如下3-4所示：

Then the MCU will perform the reset operation. In addition, if the pin has been in the high-level implanted state, the MCU will continue to perform the reset operation. For the reset circuit, it can be divided into two modes: automatic reset circuit and manual reset circuit. The automatic reset operation is mainly completed through the charging and discharging function of the capacitor. When the voltage rise time is less than 1ms, the single chip microcomputer can complete the automatic reset.<br>In addition to power on reset, sometimes you need to press the key to manually reset. This design is to use the key to reset manually. There are two ways to reset the key manually: level mode and pulse mode. The level reset is realized by connecting the rst (9) end with the power supply VCC. The level reset block diagram of this design is as follows 3-4: