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Reference Design HFRD-34.0 (Rev.3, 05/08) Maxim Integrated Products
Page 2 of 17
4 x 4 DVI™ KVM Switch
1 Table of Contents
2. Features....................................................... 2
3. Overview .................................................... 2
4. Application Diagrams................................. 3
5. Functional Diagrams................................... 4
6. IC Summary................................................ 7
7. Navigation Menu........................................ 12
8. Schematics, Component List and
Layout Drawings ........................................ 15
9. Gerber Files and Firmware......................... 15
10. Design Notes ............................................ 15
11. Evaluation/Use Notes ............................... 16
12. Layer Profile............................................. 16
13. Board Dimensions .................................... 17
2 Features
• 4 x 4 video, audio, and USB switch
• Fully buffered signals for extended reach
• Supports DVI resolutions up to 1920 x
1200 per port
• Simple navigation switch/LCD control
• DVI data-input equalization and
adjustable data-output preemphasis
• Schematics and Bill of Materials provided
• Firmware and Gerber files available
3 Overview
High-Frequency Reference Design (HFRD)-34.0
is a fully buffered 4 x 4 DVI KVM switch. The
design switches high-resolution DVI video (up to
1920 x 1200 resolution), analog audio, and USB
signals from one to four inputs to one to four
outputs. HFRD-34.0 supports both video and
audio fanout operation (one source to multiple
outputs). The reference design also provides 1:2
hubs on each USB port for keyboard and mouse
connections of up to four different users.
All signals are fully buffered, allowing extended
connection distances. Additionally, equalization is
provided on all DVI data input signals and
adjustable preemphasis on all DVI data outputs.
All control and configuration selections are made
through a simple navigational switch and LCD
display.
This document provides an overview of the design
and operation of HFRD-34.0.