Virtuoso Schematic Composer User Guide

Symbol and Simulation Library Generator

lmCloseLib

lmCloseLib => t/nil

Description

Closes the previously opened working library.

Note: Call lmOpenLib before starting any S/SLG command or SKILL function and call lmCloseLib when you are done if you are not using lmLoadData to load the library command file.

Example

lmCloseLib

Closes a working library previously opened by lmOpenLib.

Virtuoso Schematic Composer User Guide

Symbol and Simulation Library Generator

lmDefCell

lmDefCell( <cell name> … <parameters> )

;input and output declaration, and various parameters

;for symbol generation

[input( <term name> <term name> … <term name> )] [output( <term name> <term name> … <term name> )] [io( <term name> <term name> … <term name> )] [switch( <term name> <term name> … <term name> )] [defsymbol( <symbol arguments> )]

;delay parameters and model/element initialization for

;a timing analyzer

[delayTable( <delay arguments> )

[taModelInit( <model initialization arguments> )] [taElmInit( <element initialization arguments> )] [timingViolationTable( <timing violation arguments> )] [ <any S/SLG command or SKILL function> ]

;

;symbol generation takes place (default) symbolGen = t

;timing view generation takes place (default) taGen = t

;append properties to symbol

[lmDefViewProp( <view property arguments> )] ; append properties to terminals of symbol

[lmDefTermProp( <terminal property arguments> )]

)

Description

Defines a cell, generates a symbol, and backannotates objects.

You can use any S/SLG command or SKILL function as an argument. If you specify required parameters, the symbol view of the cell can be automatically generated. You can specify time delay information for a timing analyzer view. In addition, you can specify properties of the symbol view for simulation and other purposes.

Properties

Each argument specified inlmDefCell is sequentially run in addition to default symbol generation and timing view generation. You can add commands (such as lmDefViewProp and lmDefTermProp) to manipulate symbol properties. You can specify a complete characterization of the symbol in the argument.

Virtuoso Schematic Composer User Guide

Symbol and Simulation Library Generator

Variables

You can set the values of several global Boolean variables to change default values. The symbolGen variable controls symbol generation. The default value, t, triggers symbol generation as the first action oflmDefCell. If you set symbolGen to nil, no symbol generation takes place.

The taGen variable controls timing view generation. The default value, t, enables timing view generation if delayTable parameters are specified. If you settaGen to nil, no timing view generation takes place.

timingViolationTable Illegal timing.

Example

lmDefCell( aoi32

input(A1 A2 A3 B1 B2) output(Y) lmDefViewProp(

; add some properties to the symbol )

)

Generates a symbol view for the cell aoi32.

Virtuoso Schematic Composer User Guide

Symbol and Simulation Library Generator

lmDefTermProp

lmDefTermProp( [<cell name>] [<view name>]

( <terminal list> <property name> <property value> … <property name> = <property value> )

( <terminal list> <property name> = <property value> … <property name> <property value> )

)

Description

Adds properties to the terminals of the specified cellview. To add terminal properties, add specified properties to the original property list and save the new file.

Variables

The replaceTermProp global variable controls the property-adding mode. The default value is nil, which means the mode is appending. If you set replaceTermProp to t, the mode is replacement. replaceTermProp is automatically set to nil when you run lmDefCell and reset to the original value when finished.

<terminal list> := <terminal name> | t | input | output | io | switch | ( <terminal name> <terminal name> … <terminal name> )

Note: If a terminal name is t, input, output, io, or switch, enclose it in quotation marks to distinguish it from the keyword.

Example

lmDefTermProp( and2 symbol ( A name = "A" )

( B name = "B" ) ( Y name = "Y" )

)

lmDefTermProp( and2

( t create = time("Apr 15 9:00:00 2000") ) ; refer to all terminals

)

lmDefTermProp( and2 symbol ( input a = 1 )

; refer to all input terminals ( Y b = 1.1)

)

lmDefTermProp( and2

( (A B) type = "input")

)

Cell and2 has input terminals A and B and output terminal Y. Puts a list of properties into these terminals.