摘要
介绍了一种以单片机AT89C51为控制模块的高精度倒计时系统,该系统采用高集成时钟芯片DS12C887为时钟模块,与555时基电路构成多谐振荡器再进行分频的系统相比,系统性能稳定,连续长期运行积累误差为零,且便于实际开发。
This paper introduces a high -precision clock countdown system based on AT89C51. The system＇ s clock module is DS12C887. Compared with traditional use of 555 circuits constituting multivibrator then split frequency, this system has stable performance and zero long -run accumulation of errors. Actual development is convenient.
出处
《微处理机》
2010年第4期123-124,共2页
Microprocessors
