Set-Reset Flip-Flop
Setup-reset trigger, or bistable multivibrator.
Description
The Set-Reset Flip-Flop block implements a set-reset trigger switch, or bistable multivibrator.
The block supports Q and !Q output signals unless an external trigger is applied. An external trigger (Set) causes a state change that persists until a second external trigger (Reset) is applied.
The table shows the relationship between the input and output signals of the block.
Set |
Reset |
Q |
!Q |
0 |
0 |
Last Q |
Last !Q |
0 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
1 |
1 |
Undefined |
Undefined |
Ports
Parameters
Main group
Priority when undefined state - state priority
Set (By default) | Reset
Priority when undefined state, i.e. when Set and Reset ports are set to 1(true).
Initial condition for Q state - initial value of Q output signal
0 (by default) | 1
Initial value of the output signal Q.
Sample time (-1 for inherited) - block sampling time
-1 (by default) | 0 | positive scalar
The time between consecutive executions of the block. During execution, the block produces output data and updates its internal state if necessary.
For legacy discrete-time operation, set the Sample time (-1 for inherited) parameter to -1. For discrete-time operation, set this parameter to a positive integer. For continuous time operation, set this parameter to 0.
If this block is in a mask, throw the value of this parameter through the mask variables to ensure proper switching between continuous and discrete implementations of the block.