AR# 12611

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4.1i CORE Generator - Synchronous FIFO v1_0 does not appear in the main GUI, even though it is selected in the Cores Catalog Display

Description

keywords: CORE Generator, COREGen, Synchronous, FIFO

Urgency: Standard

General Description:
Synchronous FIFO v1_0 does not appear in the main Core Generator GUI, although I tried to select it by choosing Project -> Cores Catalog Display -> Customize. I cannot selected it to be displayed, so it cannot be generated at all.

When I go to the Cores Catalog Display -> Customize window and try to select the Synchronous FIFO v1_0 for the Virtex Family, the Synchronous FIFO v1_0 for the 4K Family is selected as well, but neither of them will appear in the main GUI. In addition, the core name sometimes appears a green color, then changes back to black.

Solution

This occurs because there are two versions of the Synchronous FIFO v1_0 core, one for the XC4000 family, and one for the Virtex/Virtex-II family. CORE Generator cannot distinguish which version to select, so neither one is selected.

If you are designing with the Virtex or Virtex-II family, use the latest version of the Synchronous FIFO, which is v2 or v3 and later. If you must use v1_0, then archive or rename the following directory (e.g., rename the directory "fifo" to "fifo_save_4k"):

C:\Xilinx_ISEA4.1i\coregen\ip\xilinx\primary\com\xilinx\ip\fifo

Renaming the above directory will disable Synchronous FIFO v1_0 for the XC4000 family.

If you are designing with the XC4000 family and need to use Synchronous FIFO v1_0 (for 4K), then you will need to archive (rename) the Synchronous FIFO directory for the Virtex family. Rename the following directory (e.g., rename "sync_fifo_v1_0" to "sync_fifo_v1_0_save"):

C:\Xilinx_ISEA4.1i\coregen\ip\xilinx\primary\com\xilinx\ip\sync_fifo_v1_0

Renaming the above directory will disable Synchronous FIFO v1_0 for the Virtex and Virtex-II families; however, v2_0 and newer should be available for use.
AR# 12611
Date 10/09/2003
Status Archive
Type General Article
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