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HDMI Mezzanine Card – Revision B
User’s Guide
Introduction
LatticeECP3 Video Protocol Board includes a daughter card connection to support applications that can be imple-
mented using SERDES. This daughter card connection includes three connectors for the signals of a whole
SERDES quad, the control/status signals and the power/ground pins.
The HDMI Mezzanine Card is a LatticeECP3 Video Protocol Board daughter card designed for demonstrating the
Lattice HDMI/DVI solution using LatticeECP3 SERDES. The scope of this user’s guide covers only revision B of the
HDMI Mezzanine Card. Please refer to EB52,
LatticeECP3 Video Protocol Board Revision C User’s Guide
for more
information about the LatticeECP3 device connection to the daughter card.
As shown in Figure 1, this card uses Single-Link 19-pin HDMI Type-A connectors. If using passive HDMI-to-DVI
cables, this card can also be used to support DVI video.
Figure 1. HDMI Mezzanine Card
Features
• Supports two different HDMI/DVI input paths, with or without the cable equalizer
• Supports HDMI/DVI output with TMDS level shifter
• TOSLINK fiber optic receiving module for S/PDIF audio input
• Headers for HPD, CEC controls and the EDID signals
• ESD protection devices for both HDMI/DVI inputs and HDMI/DVI outputs
Functional Description
There are four transmit channels and four receive channels in each of the LatticeECP3 SERDES quads. For imple-
menting a Single Link HDMI or DVI interface, which includes three data channels and one clock channel, all four
transmit channels and three receive channels are used. The clock channel on the receive side is connected to the
dedicated SERDES differential reference clock pins. Since the common mode voltage of the HDMI/DVI TMDS sig-
