Specifications

52 Chapter 3—Advanced Schematic Editing
 The signal RESET/ does not connect to a port connector, so it
represents a separate signal in the internal circuit. Like the devices G1,
etc., each signal in RSFF actually represents two physical signals.
Subcircuit Primitive Type
Subcircuit device symbols are simply device symbols which have the prim-
itive type “SUBCCT.” Device symbols with any other primitive type can-
not be used as subcircuit devices. SUBCCT is the default primitive type
when creating symbols with device symbol editor, so it is normally not
necessary to change this setting.
Port Interface
Signal connections between circuit levels are made using port connector
symbols. With the exception of power and ground nets, all connections
between levels must pass through a port connector.
Port/Pin Naming
The relationship between the port connector in the subcircuit and the pin on
the parent device symbol is established by matching the pin name on the
parent device with the Name field of the port connector. For example, if we
were to open the RSFF device used in the example above using the device
symbol editor, we would see the following pins listed:
For a complete port interface, a port connector must exist in the internal
circuit named to match each one of these pins. In this case, the following
port connectors would be required (ignoring all other internal circuitry):
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