8254 programmable interval timer
Post on 11-Jan-2016
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DESCRIPTION
PPT of 8254 programmable timer peripheral IC and its modes
TRANSCRIPT
8254 Programmable interval Timer
By K.Praveen kumar reddy
Features of 8254 programmable timer
Block diagram of 8254
Operating modes of counters
Control word format
Mode 0: Interruppt on terminal count
Description of mode 0
Mode 1: hardware retriggerable one shot mode
Mode 2: Rate generator
Mode 3: square wave mode
Mode 4: software triggered strobe
Mode 5: hardware triggered strobe
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