Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

HANEL

PROGRAMMING TIMERS IN CCalculating Delay Length Using Timers

‰To speed up the 8051, many recent versions of the 8051 have reduced the number of clocks per machine cycle from 12 to four, or even one‰The frequency for the timer is always 1/12

ththe frequency of the crystal

attached to the 8051, regardless of the 8051 version