Lecture27.ppt
8254 Counter/Timer. 8254 Counter Each of the three counter has 3 pins associated CLK: input clock frequency- 8 MHz OUT GATE: Enable (high) or disable.
8253 TIMER. Engr 4862 Microprocessors 8253 / 8254 Timer A.k.a. PIT (programmable Interval Timer), used to bring down the frequency to the desired level.
Engineering 4862 Microprocessors Lecture 27 Cheng Li EN-4012 [email protected].
