在单片机系统中，有 两个非常重要的电路，一个是开关 复位电路，用来复位

In the single chip system, there are two very important circuits, one is the switch reset circuit, which is used to reset the single chip and its external I / O interface circuit; the other is the crystal oscillator circuit, which is used to generate resonance and make the single chip jobs. The circuit diagram of the minimum system of the single chip microcomputer is shown in Figure 2.2.

In the microcontroller system, there are two very important circuits, one is the switch reset circuit, which is used to reset the microcontroller itself and its external extension of the I/O interface circuit, and the other is the crystal oscillator circuit, which is used to produce resonance, so that the microcontroller works. The circuit diagram for the microcontroller minimum system is shown in Figure 2.2.

In the single chip microcomputer system, there are two very important circuits: one is the switch reset circuit, which is used to reset the single chip microcomputer itself and its external extended I / O interface circuit; the other is the crystal oscillator circuit, which is used to generate resonance and make the single chip microcomputer work. The circuit diagram of the minimum system of single chip microcomputer is shown in Figure 2.2.<br>