Specifications

68 Chapter 4—Simulation
driving the line. If a non–stuck value is forced, the signal value will revert
to its appropriate new level when any change occurs on a device output
driving the line.
The spacebar “unstick” command causes the signal to revert to its driven
value.
 See also the Stick Signals command in Chapter 12, Menu Reference,
for more information on stuck values.
Busses
Busses—that is, groups of signals represented by a single line on the sche-
matic—have no particular significance to the simulator. The value of a bus
is completely determined by the values of the individual signals it contains.
The simulator performs no operations on the bus itself.
NOTE: You can display a bus in the Timing window using the Add To Timing com-
mand. This is equivalent to displaying all the internal signals individually
and then grouping them.
Bus Pins
Bus pins, like busses, have no particular significance to the simulator. The
value of a bus is completely determined by the values of the individual pins
it contains. The simulator performs no operations on the bus pins them-
selves. Bus pins are not supported on primitive device types.
LW Reference.bk Page 68 Monday, December 15, 2003 5:59 PM