Specifications

Saving Frequently-Used Graphics and Pins 169
Drawing the Graphics and Placing Pins on the
Subcircuit Symbol
The graphic image of the part may be drawn and the pins placed on it in the same
way as was described in “Editing Device Symbols” on page 142.
c You can also generate a symbol automatically using the Auto Create
Symbol command. See the section Auto Creating a Symbol.
Opening the Subcircuit Associated with a Symbol
If the symbol currently being edited has a subcircuit already stored with it in the
library, you can use the Open Subcircuit command in the Options menu to open
it for editing. This opens the subcircuit in a design window as if it was an inde-
pendent design.
IMPORTANT: Modifying and saving the design that was opened with this command DOES
NOT automatically update the symbol or the library it was read from. If you wish to
update the symbol, you must use the Subcircuit and Part Type command and use the
“Create a subcircuit symbol and select an open circuit to attach to it” option to
reattach the modified circuit to the symbol.
Automatically Creating Symbols
The Auto Create Symbol command in the device symbol editor tool will gener-
ate a standard, rectangular symbol given a list of names for the pins on each side
Lock subcircuit by
default so the
subcircuit can't be
opened
This option has the effect of saying, “Yes.
There is a subcircuit, but in general you don't
want to go into it”. This causes the schematic
capture part of LogicWorks to prompt to make
sure it is really OK to enter the subcircuit
before doing so. It also controls if the report
generator will list the contents of this device in
a netlist. In general this is used for symbols
that represent physical parts, but there may
be a subcircuit for the simulation purposes.
Locate a new
subcircuit definition
This button allows you to replace the
subcircuit in a symbol that already has a
circuit associated with it.
LW Reference.bk Page 169 Monday, December 15, 2003 5:59 PM