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384 www.xilinx.com Development System Reference Guide
Appendix :
R
NGDBuild
This program is compatible with the following families:
• Virtex
™
, Virtex
™
-E
• Virtex
™
-II
• Virtex
™
-II Pro, Virtex
™
-II Pro X
• Virtex
™
-4
• Virtex
™
-5 LX
• Spartan
™
-II, Spartan
™
-IIE
• Spartan
™
-3, Spartan
™
-3E, Spartan
™
-3L
• CoolRunner
™
XPLA3, CoolRunner
™
-II
• XC9500
™
, XC9500XL
™
, XC9500XV
™
NGDBuild performs all the steps necessary to read a netlist file in EDIF format and create
an NGD file describing the logical design. The NGD file resulting from an NGDBuild run
contains both a logical description of the design reduced to NGD primitives and a
description in terms of the original hierarchy expressed in the input netlist. The output
NGD file can be mapped to the desired device family.
Converting a Netlist to an NGD File
The following figure shows the NGDBuild conversion process.
NGDBuild and the Netlist Readers
X10291
NCF
Netlist Constraints File
NGO
Top-Level
Netlist
(EDIF)
NMC
Physical Macros
Referenced in Netlist
NGDBuild
Files
Referenced in Netlist
NGO
For Files
Referenced in Netlist
NGC
Core Modules
Referenced in Netlist
Netlister
Launcher
Netlist Reader
(EDIF2NGD)
UCF
User Constraints File
URF
User Rules File
NGD
Generic Database
BLD
Build Report
NGC Netlist
(XST File)
PLD
Netlist