Specifications

168 Chapter 8—Device Symbol Editing
There are some subcircuit options in the lower part of the dialog:
Create a subcircuit
symbol and select an
open circuit to attach
to it.
This option prompts for an open circuit to
associate with the part being created as its
subcircuit. The circuit definition is saved with
the part in the library. This operation also
imports the circuit's port interface so that the
names of the ports appear in the list and you
can place the corresponding graphical pins
on the symbol.
Set to Symbol Only
type, never has a
subcircuit.
This option is like the No Subcircuit option
except its doesn't allow the schematic
capture part of LogicWorks to associate a
subcircuit with the part in the future.
Set to primitive type.
Must be used with
caution!
This option is used to create special
LogicWorks part types such as pseudo
devices (power, ground and port connectors)
and devices for use with the LogicWorks
Simulator. The primitive type options must
only be used with a clear understanding of
the effect they will have on program
operation and are described in “Creating
Special-Purpose Symbols” on page 176.
Delete existing pins
before adding pins
defined in subcircuit
This option is only enabled when the selection
made above results in a port interface being
imported. If this box is checked, when the
“Done” button is pressed all of the old pins in
the pin list will be deleted. This allows a new
port interface to be brought in without any
conflicts with the existing pin list. If this option
wasn't checked then port names would be
merged with the names in the list. Duplicate
pin names and their related properties remain
unchanged, except they are now associated
with the new port. Unmatched pin names in
the pin list remain exactly the same.
LW Reference.bk Page 168 Monday, December 15, 2003 5:59 PM