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Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001

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22.2 TIMERS, COUNTERS, FLIP-FLOPS, LATCHES

· There are some devices, and concepts that are Temporal. This means that they keep track of events over time, as opposed to conditional logic that decides based on instantaneous conditions.

· Controls that have states, or time dependence will require temporal controls (also known as sequential)

· Some devices that are temporal are

1. Flip-Flops - these can be latched on or off.
2. Latches - Will stay on until reset (Similar to flip-flops)
3. Counters - Keeps a count of events
4. Timers - Allows inputs and outputs to be delayed, or prolonged be a known amount.

22.2.1 Latches

22.2.2 Flip-Flops

22.2.3 Timers

22.2.4 Counters