Answers Database

FUNCNET 9404: May create bad bidirectional pins


Record #1533

Product Family:  Software

Product Line:  Cadence

Problem Title:
FUNCNET 9404:  May create bad bidirectional pins


Problem Description:
Keywords:  funcnet bidirectional

Urgency:  standard

General Description:
When running FUNCNET on your design to create a verilog model
the program completes, but may create bad bidirectional pins.

The bi-directional pins have two module ports (pins), and both
ports are declared as outputs.


Solution 1:

Check the Cadence FUNCNET script to see whether the XCDSPREP
program is invoked with the -ADDIO option set to ON.  This
switch is used to insert IBUFs and OBUFs to external signals
if these are not already present.  There is a bug with this
switch in which the I/O buffers are inserted indiscriminately.

To work around the problem, invoke FUNCNET with the -noio
option.



End of Record #1533