Trí Choinníoll maidir le Gnáth Oibriú an Mhicririaltóra

The three conditions for the operation of the microcontroller are power supply, clock crystal oscillator, and reset. When the microcontroller does not work properly, we must first check these three conditions, use a voltmeter or a multimeter to detect its power supply and ground pins, and detect whether the voltage between the two pins is about 5V; whether there is any clock crystal oscillation For normal operation, we'd better use an oscilloscope to test to see if the sine wave pulse of the corresponding frequency can be detected; the reset detection is relatively simple, the reset level of the single-chip microcomputer is generally a high-level reset, and the single-chip microcomputer is generally reset when the power is turned on. A high level of about 5V will appear on the pin. In addition, when the reset button is pressed, a high level will also appear on the reset pin, which can be detected with a general voltmeter or multimeter.