Toggle_FlipFlop: Toggling of Flip Flop Input/Output

Toggle_FlipFlop Function Block

Pin Diagram

This figure shows the pin diagram of the Toggle_FlipFlop function block:

Functional Description

The Toggle_FlipFlop function block implements the truth table for T(Toggle) flip-flop with set priority.

The Toggle_FlipFlop is a type of Flip-Flop which obeys this truth table:

i_xRst	i_xT_(n-1)	i_xT_(n)	q_xQ_(n)	q_xQ_(n+1)
0	0	0	X	Q_(n)
0	0	1	0	1
0	0	1	1	0
0	1	x	x	Q_(n)
1	x	x	x	0
n ‘n’ is the present state and (n+1) is the next state.

It has two inputs, namely, i_xT input, and a Reset input, or i_xRst. It also has an output q_xQ.

Input Pin Description

This table describes the input pins of the Toggle_FlipFlop function block:

Input	Data Type	Description
i_xT	BOOL	Rising edge 0...1 toggles the flip-flop. Factory setting: FALSE
i_xRst	BOOL	TRUE: Resets the flip-flop output. FALSE: Disabled (factory setting)

Input

Data Type

Description

i_xT

BOOL

Rising edge 0...1 toggles the flip-flop.

Factory setting: FALSE

i_xRst

BOOL

TRUE: Resets the flip-flop output.

FALSE: Disabled (factory setting)

Output Pin Description

This table describes the output pins of the Toggle_FlipFlop function block:

Output	Data Type	Description
q_xQ	BOOL	Flip-flop output