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Codiode/Problems/Sequential Logic

D Master-Slave: Internal Node Trace

MediumLogic CircuitTiming Diagram

A negative-edge-triggered master-slave D flip-flop consists of two cascaded latches: a master latch transparent when CLK is HIGH, and a slave latch transparent when CLK is LOW.

Four signals are shown: CLK (clock, period 8), D (input data), QM (internal master latch output, initially 0), and Q (final slave latch output, initially 0).

Trace QM and Q across all 16 time steps.

Constraints

  • Master latch QM is transparent when CLK is 1 and holds state when CLK is 0.
  • Slave latch Q is transparent when CLK is 0 and holds state when CLK is 1.

Topics

master-slavelatchestiming-diagramflip-flops

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