What is the purpose of the preset (Pr) and clear (Cl) inputs on a flip-flop?
Explanation
While most inputs to a clocked flip-flop are synchronous (meaning they are only considered at the active clock edge), the preset and clear inputs are typically asynchronous. They provide a way to immediately force the flip-flop into a known state (1 for preset, 0 for clear) without waiting for a clock pulse, which is useful for initializing a system.
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