| 用C8051FXXX系列芯片实现实时时钟功能 |
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| 引用本文： | Cugnal Integrated Products Inc. 用C8051FXXX系列芯片实现实时时钟功能[J]. 电子质量, 2001, 0(11): 69-71 |
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| 作者姓名： | Cugnal Integrated Products Inc |
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| 作者单位： | Cugnal Integrated Products，Inc |
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| 摘 要： | 当系统时钟使用高频内置振荡器时，辅助振荡器可用来驱动石英作实时时钟（RTC）。系统时钟信号可取自内置和辅助振荡器，改变RTC信号源时不会降低其精度，RTC使用定时器2，它是为给辅助输入信号下降沿计数而设置的。CPO用来把石英振荡波形转换成方波。
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| 关 键 词： | 实时时钟 C8051FXXX系列芯片 石英振荡器 RTC |
Implementing a Real-Time clock |
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| Cugnal Integrated Products Inc. Implementing a Real-Time clock[J]. Electronics Quality, 2001, 0(11): 69-71 |
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| Authors: | Cugnal Integrated Products Inc |
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| Abstract: | The external oscillator can be used to drive a crystal for the RTC while the system clockuses the high-frequency internal oscillator. The system clock can be derived from the internal orexternal oscillato, and can change sources without compromising the accuracy of the RTC. The RTC uses Timer 2. which Is configured to increment on falling edges of an external Input. Comparator 0 is used to convert the crystal waveform to a square wave. |
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| Keywords: | Real-Time: C8051Fxxx series chips |
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