Specifications

Saving Frequently-Used Graphics and Pins 175
signal is an input to the block and that MEMW/ and MEMR/ are outputs:
 Select the first internal pin name from the symbol editor's pin list.
In this example it is CLK.
 Use the pin function pop-up menu at the top of the list to select
Output for the pin function.
 Click on the next pin in the list.
 For the remaining pins MEMW/ and MEMR/ the default value of
Input is correct since the parent pin is an output. Check that the
remaining pins are correct.
5) Create a symbol for the connector, perhaps a simple rectangle.
6) Select the bus pin, PORT in the pin name list.
7) Place a bus pin from the device symbol editor's tool palette.
8) Set the primitive type for the device.
 Select “Subcircuit & Part Type...” from the Options menu.
 From the “Subcircuit & Part Type” dialog select “Primitive, Use
Caution”
 From the pop-up choose “PORT CONNECTOR”.
 Select “Done”.
9) From the “File” menu choose “Save As...”
10) Choose or create a working library to save the part.
11) Close the device symbol editor window.
12) Place your new Bus Port Connector in your internal circuit.
NOTE: The pin name of the bus pin itself (in this case “PORT”) is not important. The
association between the Bus Port Connector and the parent bus pin is made by the
name applied to the Bus Port Connector symbol itself. I.e. The same Bus Port
Connector symbol can be used for any bus with the same internal signal names.
The comments under “Port Pin Type” on page 53 apply to each internal pin in a bus
pin. The bus internal pins do not have to be the same. You can include any
combination of names and functions in one bus pin.
LW Reference.bk Page 175 Monday, December 15, 2003 5:59 PM