Research on the Time Precise Controlling Based on MCS-51 SCM

With the requirement improving.It is important for MCS51 SCM can control time precisely in industry.But the traditional software time will arise the accumulative error because the time cycle is not considered perfectly,because of the interrupt response time is not confirmed,the error arose by the timer interrupt method is not rooted.From such aspects as properly considering the instruction executing cycle,skillfully setting initial value,dexterously utilizing the overflow value of the counter,rightly openingclosing the interrupt,the paper advances four different methods to correct the error.In the end the paper thinks it is possible to improve the time precision from the hardware itself.