RAM 4.5 BUX II Series Manual de usuario descargar pdf (Pagina 11)

Jianjian Song LogicWorks 4 Tutorials (5/15/03) Page 11 of 14

4.3 Create a 4-bit counter sub-circuit with bus port connectors

Bus port connectors can be used like Port In and Port Out connectors in a sub-circuit. When

connecting a bus port to a breakout, make sure the corresponding pin names are exactly the same.

For example, the breakout D0-3 matches the Bus Port In that has input pins D0-3.

Here is a subcircuit with the bus ports.

CLK

CLR

DEV1

clear

load

clock

carry_out

Bus Port In

bus port out

4.4 Create a 4-bit counter device symbol with bus pins.

The procedure is the same as that of creating a device symbol from a subcircuit. However, pin

function for input pins should now be changed to Input. And pin function for output pins should

be Output as shown in the following picture.

When a subcircuit with bus ports is attached to a device symbol, it is possible that the pin

directions are all reversed. Therefore, it may be necessary to manually change pin directions.

Check all pin directions to make sure they are correct, i.e., output pins should have pin type of

output and input pins should have pin types of input.

load clear

clock

carry_out

D3-0

Q3-0

4-bit counter

5 10

1 2 ... 6 7 8 9 10 11 12 13 14

Sin comentarios

RAM 4.5 BUX II Series Manual de usuario Pagina 11