LED Bar

Found in Input/Output Library

• Live Circuit: LED Bar

Behavior

Displays a row of LEDs. Each LED lights up when its corresponding input is active (as determined by the Active On High? property).

This is similar to the LED, but groups multiple LEDs into a single component. It is especially useful for visualizing the bits of a multi-bit value, such as the contents of a register or counter.

Ports

You can configure an LED Bar to have multiple inputs, one per LED, or a single multi-bit input that controls all LEDs.

Keyboard Shortcuts

• Arrow keys change the Facing property.
• Arrow keys while holding the option key (⌥) or Alt key change the Label Location property.
• Typing a number (1-32) changes the Segments property.

Properties

Facing

The direction the component faces. Changing this rotates the entire component, including its ports.

Input Format

Whether to use one 1-bit input per LED (separated) or a single multi-bit bus input (bus).

Segments

The number of LEDs in the bar, from 1 to 32.

Active On High?

If yes, an LED lights up when its input bit is 1. If no, it lights up when its input bit is 0.

On Color

The color of a lit LED.

Off Color

The color of an unlit LED.

LED Shape

Whether LEDs are rectangular or round. Rectanglular LEDs are packed more tightly.

Label

Text label displayed near the component.

Label Location

Which side of the component the label appears on.

Label Font

The font used to draw the label.

Label Color

The color used to draw the label.

Poke Tool Behavior

None — the LED Bar does not respond to being poked.

FPGA Synthesis

Supports VHDL and Verilog synthesis.