Operator SignalDebounce

The operator suppresses fast signal changes. Parameter Debounce defines a minimum time an input signal has to be constant before it is forwarded to the output. Inputs which are changing faster are suppressed. The following figure illustrates the operator's behavior.

The debounce time is measured in Ticks being one (HIGH), i.e. Tick acts like a prescaler input. Is Tick set constantly to one (HIGH), the debounce operator counts the signal duration at the design clock frequency. In most applications the Tick input is not required. Tie it to operator Vcc in these cases. The following waveform shows the operator's behavior when using the Tick input link.

Note that the operator acts like a delay element. Any signal changes that meet the debounce specification of being unchanged for N Ticks will be forwarded to the operator output after the delay of N Ticks. However, the pulse form remains unchanged.

An additional reset input allows the reset of the operator.

This operator is excluded from the VisualApplets functional simulation.

I/O Properties

Property Value
Operator Type O
Input Links I, signal data input
Tick, signal data input
Reset, signal data input
Output Link O, signal data output

Supported Link Format

Link Parameter Input Link I Input Link Tick Input Link Reset Output Link O
Bit Width 1 1 1 as I
Arithmetic unsigned unsigned unsigned as I
Parallelism 1 1 1 as I
Kernel Columns 1 1 1 as I
Kernel Rows 1 1 1 as I
Img Protocol VALT_SIGNAL VALT_SIGNAL VALT_SIGNAL as I
Color Format VAF_GRAY VAF_GRAY VAF_GRAY as I
Color Flavor FL_NONE FL_NONE FL_NONE as I
Max. Img Width any any any as I
Max. Img Height any any any as I

Parameters

DebounceBits
Type static parameter
Default 16
Range [1, 64]

This parameter specifies the bit maximum range of parameter Debounce. Only of Debounce set to dynamic, this parameter can be changed.

Debounce
Type dynamic read/write parameter
Default 2
Range [0, 2^DebounceBits-1] if dynamic, [0, 2^64-1] if static

Defines the debounce time.

Examples of Use

The use of operator SignalDebounce is shown in the following examples: