Digital Ring Constant

Owning Palette: Digital Waveform VIs and Functions

Requires: Base Development System

Use the digital ring constant to set the digital bit state of a digital waveform or digital data.

Add to the block diagram

Find on the palette

You select, add or remove, and rearrange values in ring constants much the same way you do for ring and enumerated controls.

The digital ring constant includes a predefined list of the eight digital states supported by the digital waveform and digital data type:

Digital Data State	Description
0 (Force Down)	Force logic low. Drive to the low voltage level (VIL).
1 (Force Up)	Force logic high. Drive to the high voltage level (VIH).
Z (Force Off)	Force logic high impedance. Turn the driver off.
L (Compare Low)	Compare logic low (edge). Compare for a voltage level lower than the low voltage threshold (VOL).
H (Compare High)	Compare logic high (edge). Compare for a voltage level higher than the high voltage threshold (VOH).
X (Compare Unknown)	Compare logic unknown. Do not compare.
T (Compare Off)	Compare logic high impedance (edge). Compare for a voltage level between the low voltage threshold (VOL) and the high voltage threshold (VOH).
V (Compare Valid)	Compare logic valid level (edge). Compare for a voltage level either lower than the low voltage threshold (VOL) or higher than the high voltage threshold (VOH).

You can change the representation of a ring constant to any digital state you want to use.