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FX12 Board Errata

Revision: August 16, 2006

Digilent
www.digilentinc.com
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Overview

The Digilent FX12 board (the FX12) is an integrated circuit development platform for Xilinx's Virtex-4 FX12 FPGA. This document describes modifications to the FX12 board that are made after the original manufacturing operation.

Item #1

Description

The two JTAG data signals (TDI and TDO) routed to the parallel-4 connector on the FX12 board were swapped, rendering the parallel-4 connector unusable. These signals are not swapped for the parallel-3 6-pin connector; this problem only affects the parallel-4 connector.

This item affects only Rev B boards.

Visual Reference: The first image shows the FX12 board, identified as "FX12 CARD", with various components and connectors. It is labeled "Board revision identification".

Remedy

Boards have been modified by Digilent to correct this problem. The TDI and TDO traces between the parallel-3 and parallel-4 connectors were cut, and jumpers added to connect the traces correctly. This modification has been validated and tested on all boards. No functional problems exist.

This fix will be incorporated into the PCB for Rev C boards.

Visual Reference: The second image displays the back side of the FX12 board, illustrating "Cuts and Jumps" made to reroute signals, as part of the "FX12 Board Modifications".

Requirements

No actions are required by users. Required modifications are made by Digilent prior to distribution.

Doc: 503-108 | page 1 of 1

Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.

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