Flip Flops

Flip Flops - Flip Flops Password_ Copyright 2009 Daniel...

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Flip Flops Password_________________ © Copyright 2009 Daniel Tylavsky
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So far we’ve looked at two types of flip flops. We started by looking at(asynchronous)latches. A latch with synchronizing input we called a flip flop . S Clk R Q Q RS Flip Flop S R Q + 0 0 Q 0 1 0 1 0 1 1 1 ---- Truth Table for RS Flip Flop D Clk Q Q D Flip Flop D Q + 0 0 1 1 Truth Table for D Flip Flop Flip Flops
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There are three types of triggering. Level Triggered: Flip-flop can only change state when the clock input is at a specific logic level. Positive Edge Triggered: Flip-flop changes state on the rising (leading) edge of the clock. Negative Edge Triggered: Flip-flop changes state on the falling (trailing) edge of the clock. T=0 Clock T Rising (Leading) Edge Falling (Trailing) Edge Flip Flops
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Different triggering types are indicated by different symbols on the clock input. D Clk Q Q D Flip Flop Level D Clk Q Q D Flip Flop Positive Edge D Clk Q Q D Flip Flop Negative Edge Flip Flops
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Examine the response of each triggering type to the same input. Clk
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Flip Flops - Flip Flops Password_ Copyright 2009 Daniel...

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