BASED ON SCM ELECTRONIC CLOCK DISIGN
ABSTRACT
Now, most of the high precision tools have used quartz crystals oscillator. As the
electron clock, quartz watches and quartz have adopted quartz technique ， which is
empty and high precision,good stability,andconvenience, there is no need to constantly
adjust the use of electronic clock. Digital watches, which have reduced the timing
errors and hve the houre、minite and second and can also underway and proofreading
and slice of flexibility, have used integrated circuit to count time, in which decoding
have replaced michical driven, and led display monitors replaced the pointer to display
time. In recent years as technology evolved, microcontroller and PLC applications
have go fother. promoting traditional control testing technical updating earlier. You
can use the earlier digital circuit or circuit and hybrid circuit .
In this complment, we have used the microcontroller to make true the timing of
the digital clocks, in which has a core element of AT89c2051, with the morden counting
michine digital to display at the "time", "points" and "seconds". Compared to the
conventional mechanical watch, it is empty and intuitive . Its characteristics of the time
period is 24 hours, and full scale as a "23’59’ 59, and other functions of the school after
the electricity supply, to have time to achieve credible a synchronous.
KEY WORDS: MICROCONTROLLER，AT89C51，LED，DISPLAY，CLOCK
