User`s guide

Definin
g
a Di
g
ital Stimulus 14
-17
When placed, each symbol must be connected to the wire or bus
of the corresponding radix. Generally, only the FORMAT,
TIMESTEP, and COMMANDn attributes need to be modified.
Typically, each COMMANDn attribute only contains one
command line. It is possible to enter more than one command
line per attribute by placing \n+ between command lines in a
given definition. (The n must be lower case and no spaces
between characters; spaces may precede or follow the entire key
sequence.
Table 14-2
STIMn Part Attributes
Attribute Description
WIDTH Number of output signals (nodes).
FORMAT Sequence of digits defining the number of
signals corresponding to a digit in any <
value
>
term appearing in a COMMAND
n
attribute
definition. Each digit must be either 1, 3, or 4
(binary, octal, hexadecimal, respectively); the
sum of all digits in FORMAT must equal
WIDTH.
IO_MODEL I/O model describing the stimulus’ driving
characteristics.
IO_LEVEL Interface subcircuit selection from one of the
four analog/digital subcircuits provided with
the part’s I/O model.
DIG_PWR Digital power pin used by the interface
subcircuit.
DIG_GND Digital ground pin used by the interface
subcircuit.
TIMESTEP Number of seconds per clock cycle or step.
COMMAND1-
COMMAND16
Stimulus transition specification statements
including time/value pairs, labels, and
conditional constructs.
Refer to the online MicroSim
PSpice A/D Reference Manual
for information about command
line syntax.