Special Constants
|
Constant |
Description |
|
.C. |
Clocked input (low-high-low transition) |
|
.D. |
Clock down edge (high-low transition) |
|
.F. |
Floating input or output signal |
|
.K. |
Clocked input (high-low-high transition) |
|
.P. |
Register preload |
|
.SV# # = 2 through 9 |
Drive the input to super voltage 2 through 9 |
|
.U. |
Clock up edge (low-high transition) |
|
.X. |
Don't care condition |
|
.Z. |
Tristate value |
Special constants must be referenced with surrounding periods, and can be upper- or lowercase.
You can assign an identifier to a special constant to simplify entry. For example, declaring C = .C. allows you to use C without the surrounding periods to indicate the special constant value .C.