There are oscillation circuits in the single chip microcomputer system. It combines the internal circuits of the single chip microcomputer to produce the clock frequency required by the single chip microcomputer. The higher the crystal frequency provided by the single chip microcomputer crystal oscillator, the faster the single chip microcomputer will run. The execution of all instructions of the single chip microcomputer is based on the crystal frequency provided by the single chip microcomputer. The function of SCM crystal oscillator is to provide basic clock signal for the system. Generally, a system shares a crystal oscillator, which is convenient for keeping all parts in synchronization. Some communication systems use different crystal oscillators for the fundamental frequency and the RF frequency, and keep synchronization through the method of electronic frequency. STC89C51 use 11.0592MHz The crystal oscillator is used as the oscillating source. Because of the oscillation circuit inside the single chip microcomputer, only one crystal oscillator and two capacitors are connected outside. The capacitance is generally between 15-50pf.<br>
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