JK Flip-flop
Purpose
Implement edge-triggered JK flip-flop
Library
Control / Logical
Description
The JK flip-flop changes its output when an edge in the clock signal is detected according to the following truth table:
J | K | Q | /Q |
0 | 0 | No change | No change |
0 | 1 | 0 | 1 |
1 | 0 | 1 | 0 |
1 | 1 | /Qprev | Qprev |
As long as no edge is detected in the clock signal the outputs remain stable.
When a trigger occurs and J = K = 1 the outputs are toggled, i.e change from 1 to 0 or vice versa.
The inputs J and K are latched, i.e. when a triggering edge in the clock signal is detected the values of J and K from the previous simulation step are used to set the output. In other words, J and K must be stable for at least one simulation step before the flip-flop is triggered by the clock signal.
Parameters
- Trigger edge
- The direction of the edge on which the inputs are read.
- Initial state
- The state of the flip-flop at simulation start.
Probe Signals
- J
- The input signal J.
- K
- The input signal K.
- Clk
- The clock input signal.
- Q
- The output signals Q.
- /Q
- The output signals /Q.