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Codiode/Problems/Sequential Logic

Synchronous Reset: One Clock Cycle Delay Waveform

EasyLogic CircuitTiming Diagram

A positive-edge-triggered D flip-flop with a synchronous active-low reset updates its state only on the LOW-to-HIGH transition of the clock.

Three signals are shown: CLK (clock, period 2), D (data input), and RST_bar (active-low synchronous reset).

Trace the output signal Q across all 12 time steps.

Constraints

  • The output Q can only change its value on the rising edge of CLK.
  • When RST_bar is 0 during a rising clock edge, Q becomes 0 regardless of the D input.
  • Changes to RST_bar between clock edges have no immediate effect on Q.

Topics

resetsequential-logictiming-diagramflip-flops

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