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AR# 4803

Foundation 1.5, FPGA Express 2.1.x: Express Constraints GUI is missing Xilinx Options tab

説明

Keywords: Express, Foundation, Spartan, Xilinx, Options, GSR, STARTUP

Urgency: Standard

General Description:
When using FPGA Express to synthesize a design to a Spartan or a Spartan XL,
the Express Constraints GUI is missing the "Xilinx Options" tab.

ソリューション

The only feature this particular tab offers for Spartan designs is to
"Ignore unlinked cells during GSR mapping". This option will infer the STARTUP
module if the design contains black boxes and all the synchronous logic is
set/reset by a single signal.

If your design fits these conditions (Spartan/XL, black boxes, on set/reset
signal), you will have to instantiate the STARTUP module in your HDL code
rather than having Express infer it.
AR# 4803
作成日 10/12/1998
最終更新日 08/31/2001
ステータス アーカイブ
タイプ 一般