Answers Database

M1.3/M1.4 CPLD: Ngdbuild does not accept some XNF files created by Previous versions of XACT


Record #2512

Product Family:  Software

Product Line:  Merged Core

Problem Title:
M1.3/M1.4 CPLD: Ngdbuild does not accept some XNF files created by
Previous versions of XACT



Problem Description:
Keywords: m1, readpld, xnf, fbmc, type, DFF, arithmetic, CE

Urgency: standard

General Description:

M1 software can not read the following XNF netlists for CPLD
families:

A. Created from either PLUSASM or ABEL source code by Readpld
   in XACT 6.x. The reason being that the FBMC symbols in the
   XNF files have TYPE property attached. TYPE is a reserved
   word in the M1 database.

B. Containing any XC7300 arithmetic

C. Containing any DFF symbols with CE input pins


Solution 1:

PLUSASM users, use the original PLD file as the source.



Solution 2:

Replace the attribute TYPE in the XNF file with the property
REG.



Solution 3:

For XC7300 arithmetic designs, you must create a new netlist
based on M1 schematic macro library



End of Record #2512