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