Clock

Library:	Base
Introduced:	2.0 Beta 13
Appearance:

Behavior

The clock toggles its output value on a regular schedule as long as ticks are enabled via the Simulate menu. (Ticks are disabled by default.) A "tick" is Logisim's unit of time; the speed at which ticks occur can be selected from the Simulate menu's Tick Frequency submenu.

Note that Logisim's simulation of clocks is quite unrealistic: In real circuits, multiple clocks will drift from one another and will never move in lock step. But in Logisim, all clocks experience ticks at the same rate.

Pins

A clock has only one pin, an output with a bit width of 1, whose value will represent the current value of the clock. The location of this pin is specified in the Facing attribute. The clock's value will toggle on its schedule whenever ticks are enabled, and it will toggle whenever it is clicked using the Poke Tool.

Attributes

Facing

The side of the component where its output pin should be.

High Duration

The length of time within each cycle that the clock's output should be 1.

Low Duration

The length of time within each cycle that the clock's output should be 0.

Label

The text within the label associated with the clock component.

Label Location

The location of the label relative to the component.

Label Font

The font with which to render the label.

Poke Tool Behavior

Clicking a clock component will toggle its current output value immediately.

Text Tool Behavior

Allows the label associated with the component to be edited.

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