Answers Database

M1.3/M1.4 CPLD: Exemplar netlists use IOBUFE which is not expanded by 9klibrary.


Record #2660

Product Family:  Software

Product Line:  EPLD Core

Problem Title:
M1.3/M1.4 CPLD: Exemplar netlists use IOBUFE which is not expanded by
9klibrary.



Problem Description:
Keywords: Exemplar, iobufe, 9500, xr5055, expanded

Urgency: standard

General Description:

In XACT6, IOBUFE was included in the 9k XNF macro library that was used for all

design flows. In M1, IOBUFE exists only in the XSI expansion library. Exemplar
designs containing bidi-I/Os fail with the ngdbuild warning "Logical block...
of type IOBUFE not expanded" followed by Hitop wrning xr5055.


Solution 1:

Change the extension of the output file in the Exemplar menu to
".sedif" (or ".sxnf") to allow ngdbuild to use the XSI library
which expands the IOBUFEs.



End of Record #2660