Latches, Flip-Flop and Pewaktu (Timer)
Latches (definition)
The output of a latch depends on its current inputs and on its previous output and its change of state can happen at any time when its inputs change
- S-R (Set-Reset) Latch
- Gated S-R Latch
- Gated D Latch
S-R Latch Active-HIGH Input S-R Latch
The Gated S-R Latch
A gated latch requires an Enable input, EN (G is also used to designated an enable input). The S and R inputs control the state to which the latch will go when a HIGH level is applied to the EN input. The latch will not change until EN is HIGH.
Edge-Triggered Flip-Flops
- Edge-triggered S-R flip-flop
- Edge-triggered D flip-flop
- Edge-triggered J-K flip-flop
The S and R inputs of the S-R flip-flop are called synchronous input because data on these inputs are transferred to the flip-flop’s output only on the triggering edge of the clock pulse.
The Edge-Triggered D Flip-Flop
The D flip-flop is useful when a single data bit (1 or 0) is to be stored.
The Edge-Triggered J-K Flip-Flop
The J-K flip-flop is versatile and is widely used type of flip-flop.The difference is that he J-K flip-flop has no invalid state as does the S-R flip-flop.
Flip-Flop Applications
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