文章对AT 89 C 51单片机芯片，晶体振荡器，涉及到的各元器件以及按键控制模型做了详细的介绍。
The article to at89C51 monolithic integrated circuit chip, the crystal oscillator, various primary devices which as well as the pressed key control model involved has made the detailed introduction.
该晶体振荡器的时钟可用于微控制器的时钟。
The clock of the crystal oscillator can be used for clocking the microcontroller.
论文提出了一个以远距离传输的标准时间信号为参考来锁定本地晶体振荡器的锁相控制系统的实现方案。
In this paper, a solution of a control system, which USES the standard time signal as the system reference to lock the local VCXO, is proposed.
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