ANALOG DEVICES UG-420 Service Manual

Evaluation Board User Guide

UG-420

10746-001

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com

Advantiv EVAL-ADV7850 Video Evaluation Board

FEATURES

4 HDMI inputs, 1 HDMI output
1 VGA input, 1 component input
1 CVBS input, 1 headphone output
1 audio DAC output, 1 audio ADC input
PC communication via RS-232 or USB interface

EQUIPMENT NEEDED

Computer with RS-232 (or USB) I/O to

Send scripts to the command line interface of the board
Send commands to the repeater software of the board and

view resulting software output

Control the board via Advantiv video evaluation software

(AVES) application

Update the firmware of the board (if desired or necessary)

PHOTOGRAPH OF EVALUATION BOARD

SOFTWARE NEEDED

Windows OS for controlling the board via AVES application

RS-232 software for updating the firmware of the board (if

desired or necessary)

GENERAL DESCRIPTION

The Advantiv® E VA L -ADV7850 video evaluation board (AVEB)
is a low cost solution for evaluating the performance of the

ADV7850 HDMI transceiver.

The evaluation board contains a Blackfin® ADSP-BF524 processor
for system control. The evaluation board includes software
(firmware) that provides a serial command interface to control
the various features and functions of the board.

Figure 1. Advantiv EVAL-ADV7850 Video Evaluation Board with Factory Jumper Settings

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.

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UG-420 Evaluation Board User Guide

TABLE OF CONTENTS

Features .............................................................................................. 1

Equipment Needed ........................................................................... 1

Software Needed ............................................................................... 1

General Description ......................................................................... 1

Photograph of Evaluation Board .................................................... 1

Revision History ............................................................................... 2

Terminology ...................................................................................... 3

Evaluation Board Hardware ............................................................ 4

REVISION HISTORY

7/12—Revision 0: Initial Version

Evaluation Board Usage ................................................................4

Headers ...........................................................................................5

Audio Codec Funtionality ............................................................5

Evaluation Board Software ...............................................................6

Upgrading the Firmware ..............................................................6

Evaluation Board Block Diagram and Artwork ............................7

Bill of Materials ..................................................................................8

Related Links ..................................................................................9

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Evaluation Board User Guide UG-420

TERMINOLOGY

Source

A source outputs digital audio/video over a DVI/HDMI,
component, VGA, or CVBS interface. This can be a DVD/Blu­ray player, set-top box, game console, or any other device with
these outputs.

Sink

A sink accepts video through a DVI/HDMI interface. In the
context of this user guide, sink nearly always refers to a display
with DVI/HDMI input.

Repeater

With respect to this evaluation board, a repeater refers to the
software that runs on the ADSP-BF524 and implements the link
between a source and sink.

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UG-420 Evaluation Board User Guide

EVALUATION BOARD HARDWARE

EVALUATION BOARD USAGE

The evaluation board can be connected as shown in Figure 2.
An HDCP license is required to purchase this board.

The RS-232 command line interface operates at a 115,200 baud
rate with eight data bits, no parity bit, one stop bit, and no flow
control. Typing help via RS-232 lists the commands that can be
used to control the board, as well as the version of firmware and
the build date.

The repeater software starts upon power-up, allowing an HDMI
sink to receive content from an HDMI/HDCP source soon after it
is connected.

There are three main ways to control the board:

• Commands via RS-232

• Repeater software via RS-232

• Advantiv video evaluation software (AV ES)

Commands via RS-232

This mode uses the RS-232 command line interface. The

ADSP-BF524 powers up to a known reset state and then outputs

a prompt. At this point, commands can be entered. Typing help
shows a list of available commands. Using the appropriate
commands, the user can read/write registers in the ADV7850.
All registers are at their reset values.

It is possible to stop the repeater software in this mode by issuing a
stoprep command via the RS-232. To restart the repeater software
issue a startrep command via the RS-232.

Repeater Software via RS-232

This mode uses the RS-232 command line interface to control the
repeater software and to direct reads and writes to the ADV7850
registers. The repeater software outputs messages via RS-232 as
events, such as encryption, formats, sink, or source changes, occur.
Registers can still be read/written from the command line, but
anything that is written to a register can be overwritten by the
repeater software if it is running.

In this mode, there are additional commands from the repeater
itself. All repeater commands are in the rep xxx format, where
xxx is the repeater command. Issue a rep help command to view a
list of the available repeater commands. These commands provide
information about the state of the repeater, source, and sink.

AVES

AVES i s a Windows®-based application that runs on a PC and
allows the user to read/write registers in the
software also displays the individual bit fields for each register
and allows the user to modify these individual bit fields. The
software supports RS-232, USB, and I
Aardvark I
evaluation board is located on the E VA L -ADV7850 page on
EngineerZone at ez.analog.com/docs/DOC-2152.

Additional information about the software is located at

ez.analog.com/docs/DOC-1789. The latest version of the

software can also be downloaded from this Web page.

2

C/SPI host adapter). Information about the video

ADV7850. The

2

C (using the Total Phase

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