Synchronous Reset: One Clock Cycle Delay Waveform
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
Qcan only change its value on the rising edge ofCLK. - When
RST_baris 0 during a rising clock edge,Qbecomes 0 regardless of theDinput. - Changes to
RST_barbetween clock edges have no immediate effect onQ.
Topics
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