Download PSpice A/D Reference Guide

PSpice Reference Guide
Digital devices
Stimulus generator
Device
format
U<name> STIM(<width>, <format array>)
+ <digital power node> <digital ground node>
+ <node>*
+ <I/O model name>
+ [STIMULUS=<stimulus name>]
+ [IO_LEVEL=<interface subckt select value>]
+ [TIMESTEP=<stepsize>]
+ <command>*
Arguments and options
<width>
Specifies the number of signals (nodes) output by the stimulus generator.
<format array>
Specifies the format of <value>s used in defining the stimulus.
<format array> is a sequence of digits which specifies the number of
signals (nodes) that the corresponding digit in a <value> represents.
Each digit of <value> is assumed to be in base 2<m> where <m> is the
corresponding digit in <format array>. Each <value> must have the
same number of digits as <format array>. The sum of the digits in
<format array> must be <width>, and each digit must be either a 1,
3, or 4 (that is, binary, octal, or hexadecimal).
<digital power node> <digital ground node>
These nodes are used by the interface devices which connect analog
nodes to digital nodes or vice versa. Refer to your PSpice User’s Guide
for more information.
<node>*
One or more node names which are output by the stimulus generator. The
number of nodes specified must be the same as <width>.
<I/O model name>
The name of an I/O model, which describes the driving characteristics of
the stimulus generator. I/O models also contain the names of up to four
DtoA interface subcircuits, which are automatically called by the simulator
to handle interface nodes. In most cases, the I/O model named IO_STM
can be used from the “dig_io.lib” library file. Refer to your PSpice User’s
Guide for a more detailed description of I/O models.
June 2007
410
Product Version 16.0