BeagleBone DVI-D Cape Rev A2 System Reference

BeagleBone DVI-D Cape Rev A2 System Reference
BeagleBone DVI-D Cape
System Reference Manual
Revision A2
BeagleBone DVI-D Cape Rev A2
System Reference Manual
Revision A2
June 28th, 2012
Page 1 of 29
BeagleBone DVI-D Cape
System Reference Manual
Revision A2
THIS DOCUMENT
This work is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported
License. To view a copy of this license, visit http://creativecommons.org/licenses/bysa/3.0/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San
Francisco, California, 94105, USA.
All derivative works are to be attributed to BeagleBoardtoys.com.
For more information, see http://creativecommons.org/license/resultsone?license_code=by-sa
For any questions, concerns, or issues submit them to support@beagleboardtoys.com
BEAGLEBONE DVI-D CAPE DESIGN
These design materials referred to in this document are
*NOT SUPPORTED* and DO NOT constitute a
reference design. Only “community” support is allowed via
resources at Beagleboardtoys.com/support
THERE IS NO WARRANTY FOR THE DESIGN
MATERIALS, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE
STATED IN WRITING THE COPYRIGHT HOLDERS
AND/OR OTHER PARTIES PROVIDE THE DESIGN
MATERIALS “AS IS” WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND
Page 2 of 29
BeagleBone DVI-D Cape
System Reference Manual
Revision A2
FITNESS FOR A PARTICULAR PURPOSE. THE
ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE DESIGN MATERIALS IS
WITH YOU. SHOULD THE DESIGN MATERIALS
PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
We mean it; these design materials may be totally
unsuitable for any purposes.
Page 3 of 29
BeagleBone DVI-D Cape
System Reference Manual
Revision A2
BeagleBoardToys provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR
EVALUATION PURPOSES ONLY and is not considered by BeagleBoardtoys.com to be a finished endproduct fit for general consumer use. Persons handling the product(s) must have electronics training and
observe good engineering practice standards. As such, the goods being provided are not intended to be
complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety and environmental measures typically found in end products that incorporate such
semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the
European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other
related directives.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may
be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS
THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies BeagleBoardtoys.com from all claims arising from the handling or use of the goods. Due to the
open construction of the product, it is the user’s responsibility to take any and all appropriate precautions
with regard to electrostatic discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE
LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES.
BeagleBoardtoys.com currently deals with a variety of customers for products, and therefore our
arrangement with the user is not exclusive. BeagleBoardtoys.com assumes no liability for applications
assistance, customer product design, software performance, or infringement of patents or services
described herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide
prior to handling the product. This notice contains important safety information about temperatures and
voltages. For additional information on BeagleBoardtoys.com environmental and/or safety programs, please
contact visit BeagleBoardtoys.com.
No license is granted under any patent right or other intellectual property right of BeagleBoard.org covering
or relating to any machine, process, or combination in which such BeagleBoardtoys.com products or
services might be or are used.
Mailing Address:
Beagleboardtoys.com
1380 Presidential Dr. #100
Richardson, TX 75081
U.S.A.
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BeagleBone DVI-D Cape
System Reference Manual
Revision A2
WARRANTY: The BeagleBone DVI-D is warranted against defects in materials and workmanship
for a period of 90 days from purchase. This warranty does not cover any problems occurring as a
result of improper use, modifications, exposure to water, excessive voltages, abuse, or accidents.
All boards will be returned via standard mail if an issue is found. If no issue is found or express
return is needed, the customer will pay all shipping costs.
Before returning the board, please visit Beagleboardtoys.com/support
To return a defective board, please request an RMA at
http://www.beagleboardtoys.com/support/rma
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BeagleBone DVI-D Cape
System Reference Manual
Revision A2
Table of Contents
FIGURES ...................................................................................................................................................... 7
TABLES ........................................................................................................................................................ 7
1.0
INTRODUCTION............................................................................................................................... 9
2.0
CHANGE HISTORY.........................................................................................................................10
2.1 CHANGE HISTORY ............................................................................................................................10
2.2 REV A1 VS. A2.................................................................................................................................10
2.3 REV A VS. A1 ..................................................................................................................................10
2.3.1
PCB Changes.........................................................................................................................10
2.3.2
Design Changes .....................................................................................................................10
2.3.3
Production Changes ..............................................................................................................11
3.0
BEAGLEBONE DVI-D CAPE OVERVIEW ..................................................................................12
3.1
3.2
3.3
3.4
4.0
FEATURES AND SPECIFICATIONS ............................................................................................17
4.1
4.2
4.3
4.4
4.5
4.6
5.0
DESCRIPTIONS..................................................................................................................................12
BOX CONTENT .................................................................................................................................13
GETTING STARTED ...........................................................................................................................13
REPAIRS ...........................................................................................................................................16
KEY COMPONENT LOCATIONS .........................................................................................................17
DVI-D INTERFACE ...........................................................................................................................18
HDMI CONNECTOR .........................................................................................................................18
MAIN EXPANSION HEADER ..............................................................................................................19
PMIC EXPANSION HEADER .............................................................................................................19
MECHANICAL SPECIFICATIONS ........................................................................................................20
BEAGLEBONE DVI-D CAPE SYSTEM ARCHITECTURE AND DESIGN .............................21
5.1 SYSTEM BLOCK DIAGRAM ...............................................................................................................21
5.2 DVI-D INTERFACE ...........................................................................................................................22
5.2.1
Main Expansion Headers ......................................................................................................22
5.2.2
Bus Transceiver .....................................................................................................................23
5.2.3
Digital Transmitter ................................................................................................................23
5.3 EEPROM ........................................................................................................................................24
5.3.1
EEPROM Address .................................................................................................................25
5.3.2
I2C Bus ..................................................................................................................................26
5.4 USER LED’S ....................................................................................................................................26
6.0
MECHANICAL INFORMATION ...................................................................................................28
6.1
6.2
7.0
BEAGLEBONE DVI-D CAPE DIMENSIONS ........................................................................................28
DVI_PDN JUMPER ...........................................................................................................................28
DESIGN MATERIALS .....................................................................................................................29
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Revision A2
Figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
The BeagleBone DVI-D Cape ...................................................................... 12
DVI-D Cape and BeagleBone ....................................................................... 13
The Angstrom log-in prompt ........................................................................ 15
Major Components........................................................................................ 17
HDMI Connector .......................................................................................... 18
Stackable Main Expansion Connector .......................................................... 19
Stackable Battery Expansion Connector....................................................... 19
BeagleBone DVI-D Cape High Level Block Diagram ................................. 21
BeagleBone DVI-D Cape Pin Usage ............................................................ 22
Bus Transceiver ........................................................................................ 23
Digital Transmitter and 2-Bit Voltage Translator ..................................... 24
BeagleBone DVI-D Cape EEPROM ........................................................ 25
User LED’s ............................................................................................... 26
BeagleBone DVI-D Cape Dimensions Drawing ...................................... 28
Tables
Table 1.
Table 2.
Table 3.
Change History ............................................................................................. 10
BeagleBone DVI-D Cape Features ............................................................... 17
User LED Control ......................................................................................... 27
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System Reference Manual
NOTES
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Revision A2
BeagleBone DVI-D Cape
1.0
System Reference Manual
Revision A2
Introduction
This document is the System Reference Manual for the BeagleBone DVI-D Cape, an
add-on board for the BeagleBone.
This document provides detailed information on the overall design and usage of the
BeagleBone DVI-D Cape from the system level perspective. It is not intended to provide
detailed documentation of any other component used on the board. It is expected that the
user will refer to the appropriate documents for these devices to access detailed
information. It will provide information on how to interact with these components from
an interface perspective. The perspective will be general in nature and not specific to any
one board.
The key sections in this document are:
Section 2.0 – Change History
Provides tracking for the changes made to the System Reference Manual.
Section 3.0 – Overview
This is a high level overview of the BeagleBone DVI-D Cape.
Section 4.0 – Features and Specification
Provided here are the features and specifications of the board.
Section 5.0 – System Architecture and Design
This section provides information on the overall architecture and design of the
BeagleBone DVI-D Cape. This is a very detailed section that goes into the design
of each circuit on the board.
Section 6.0 – Mechanical
Information is provided here on the dimensions of the BeagleBone DVI-D Cape.
Section 7.0 – Design Materials
This section provides information on where to get the design files.
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BeagleBone DVI-D Cape
2.0
Change History
2.1
Change History
System Reference Manual
Revision A2
Table 1 tracks the changes made for each revision of this document.
Table 1.
Rev
0.1
0.2
A1
A2
2.2
Change History
Changes
Initial release.
1. Updated photos
2. DVI_PDn jumper
1. Add Rev A vs. A1 section (2.2)
2. Add Getting Started section (5.2)
1. Add Rev A1 vs. A2 section (2.2)
2. Modified block diagram due to pin change of signal DVI_PDn
Date
By
12/14/2011
BBT
2/2/2012
BBT
3/30/2012
BBT
6/27/2012
BBT
Rev A1 vs. A2
The DVI_PDn signal in revision A2 is moved from pin 42 of connector P2 to pin 20 of
connector P1. In revision A1, DVI_PDn signal is mapped to GPIO0_7 which is also a
DMA interrupt. By moving DVI_PDn signal, this DMA interrupt is now available for
other Capes when BeagleBone is used with DVI-D Cape.
In addition, 4 zero ohm resistors are added to the audio circuitry; however, this addition
does not have any effect since the audio circuitry is not populated on DVI-D Cape. Both
revisions should not have any functional difference.
The PCB revision is also changed from BB-BONE-DVID-PCB-02 to BB-BONE-DVIDPCB -03.
2.3
Rev A vs. A1
2.3.1
PCB Changes
1) Remove trace from P1.4 to R90
2) Add DVI-PDn trace from P2.42 to R91
2.3.2
Design Changes
1) Add 10k pull-up resistor R123 to pin WP of U8
2) Add Testpoint 2
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BeagleBone DVI-D Cape
2.3.3
System Reference Manual
Revision A2
Production Changes
1) Red jumper from pin 42 of P2 to R91 is no longer required
BeagleBone DVI-D Rev A and A1 should functional identically. Pull-up resistor and
testpoint are added solely for production purposes.
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BeagleBone DVI-D Cape
System Reference Manual
3.0
BeagleBone DVI-D Cape Overview
3.1
Descriptions
Revision A2
The BeagleBone DVI-D Cape is designed to provide DVI-D interface for BeagleBone
boards. This board features a standard HDMI connector, which can be connected to a
DVI-D monitor using a HDMI-to-DVI-D cable. The video output of the BeagleBone
DVI-D Cape is limited to 16-bit so more pins at the expansion headers of BeagleBone
can be available for other Capes. The output resolution is hardcoded to 1024x768.
Note: The BeagleBone DVI-D Capes are not shipped with audio circuitry. This circuitry
is marked as “DNI” on the schematic and the corresponding parts are not populated on
the board. The BeagleBone DVI-D Cape only provides DVI-D interface to the
BeagleBone.
Figure 1 below is a picture of the board.
Figure 1.
The BeagleBone DVI-D Cape
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BeagleBone DVI-D Cape
System Reference Manual
Revision A2
3.2
Box Content
The final packaged BeagleBone DVI-D Cape Rev A2 product will contain the following
items:
- 1 BeagleBone DVI-D Cape in an ESD bag
3.3
Getting Started
The BeagleBone DVI-D Cape should work right out of the box with latest Angstrom
image for BeagleBone. Following the instructions below to verify the board is working:
1) Mount the BeagleBone DVI-D on top of BeagleBone.
Note: The Ethernet connector on BeagleBone should fit right into the cutback
on BeagleBone DVI-D. Figure 2 shows the proper way to stack the
BeagleBone DVI-D Cape
Figure 2.
DVI-D Cape and BeagleBone
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Revision A2
2) Make sure the micro SD card using with BeagleBone has latest Angstrom image.
3) Connect the BeagleBone DVI-D Cape to a DVI-D supported monitor using a
HDMI-to-DVI-D cable.
Note: The HDMI end should be plugged into the HDMI connector on the
BeagleBone DVI-D Cape.
4) Power up the BeagleBone by using a 5V DC power supply.
5) Make sure the monitor is powered on. You should see a beaglebone logo,
Angstrom log-in prompt, and eventually Angstrom desktop. Figure 3 shows the
Angstrom log-in prompt is successfully displayed on a DVI-D supported monitor.
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BeagleBone DVI-D Cape
Figure 3.
System Reference Manual
The Angstrom log-in prompt
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Revision A2
BeagleBone DVI-D Cape
3.4
System Reference Manual
Revision A2
Repairs
If you feel the board is in need of repair, follow the RMA Request process found at
http://www.beagleboardtoys.com/support/rma
Do not send the board in for repair until a RMA
authorization has been provided.
Do not return the board to the distributor unless you want to get a refund. You must get
authorization from the distributor before returning the board
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BeagleBone DVI-D Cape
4.0
System Reference Manual
Revision A2
Features and Specifications
This section covers the specifications of the BeagleBone DVI-D Cape and provides a
high level description of the major components and interfaces that make up the board.
Table 2 provides a list of the BeagleBone DVI-D Cape’s features.
Table 2.
BeagleBone DVI-D Cape Features
Feature
DVI-D
HDMI
RGB 16-bit
3.3V (via expansion)
Interface
Connector Type
Color Depth
Power Supply
PCB
5V (via expansion)
2.15” x 3.40” (54.6mm x 86.4mm)
Two user LEDs
Board ID EEPROM
46-pin main expansion headers
10-pin battery expansion header
Indicators
EEPROM
Expansion Connector
4.1
6 layers
Key Component Locations
Figure 4 shows the location of the key components on the board.
Figure 4.
Major Components
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BeagleBone DVI-D Cape
4.2
System Reference Manual
Revision A2
DVI-D Interface
The BeagleBone DVI-D Cape can drive an LCD panel equipped with a DVI-D digital
input. This is the standard LCD panel interface of the processor and will support 16-bit
color output. DDC2B (Display Data Channel) or EDID (Enhanced Display ID) support
over I2C is provided in order to allow for the identification of the LCD monitor type and
the required settings.
4.3
HDMI Connector
The BeagleBone DVI-D Cape uses an HDMI connector that was selected for smaller
size. It does not support the full HDMI interface and is used to provide
the DVI-D interface portion only. Users must use an HDMI to DVI-D cable or
adapter to connect to an LCD monitor. This cable or adapter is not provided with the
BeagleBone DVI-D Cape. A standard HDMI cable can be used when connecting to a
monitor with an HDMI connector. Figure 5 is a picture of the HDMI connector.
Figure 5.
HDMI Connector
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BeagleBone DVI-D Cape
4.4
System Reference Manual
Revision A2
Main Expansion Header
The BeagleBone DVI-D Cape uses two dual row 46 position connectors. These
connectors are from MLE and stackable. The part number of these connectors is SSHQ123-D-08-F-LF. Figure 6 is a picture of the connector.
Figure 6.
4.5
Stackable Main Expansion Connector
PMIC Expansion Header
This connector is a single two 10-pin expansion header. This is a dual row 10 position
2.54mm x 2.54mm connector and is the same as the main connector except with less
position. Figure 7 is a picture of the connector.
Figure 7.
Stackable Battery Expansion Connector
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BeagleBone DVI-D Cape
4.6
System Reference Manual
Mechanical Specifications
Size:
Layers:
PCB thickness:
RoHS Compliant:
Weight:
2.15” x 3.40”
4
.062”
Yes
TBW
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Revision A2
BeagleBone DVI-D Cape
5.0
System Reference Manual
Revision A2
BeagleBone DVI-D Cape System Architecture and Design
This section provides a high level description of the design of the BeagleBone DVI-D
Cape and its overall architecture.
5.1
System Block Diagram
Figure 8 is the high level block diagram of the BeagleBone DVI-D Cape.
Figure 8.
BeagleBone DVI-D Cape High Level Block Diagram
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BeagleBone DVI-D Cape
5.2
DVI-D Interface
5.2.1
Main Expansion Headers
System Reference Manual
Revision A2
The BeagleBone DVI-D Cape reserves 21 pins from the expansion headers including 16
LCD data signals, 4 LCD control signals, and a DVI power down signal. The DVI-D
Cape reduces the number of LCD data signals from 24 to 16. The output quality of 16-bit
color is very similar to a 24-bit; however, more signals on the expansion header can be
available for other capes.
This cape uses the power rail SYS_5V to power the User LED’s, EDID I2C signals to the
DVI-D (HDMI) connector and the connector itself. The remaining components are
powered by power rail VDD_3V3. In addition to the monitor EDID, the Board ID
EEPROM on the DVI-D cape can also be accessed via I2C2 signals.
Figure 9 displays the DVI-D signals at connector P1
Figure 9.
BeagleBone DVI-D Cape Pin Usage
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BeagleBone DVI-D Cape
5.2.2
System Reference Manual
Revision A2
Bus Transceiver
LCD data and control signals are buffered through 74AVC32T245 which is a 32-bit dual
supply bus transceiver. The 74AVC32T245 also features configurable voltage translation
and can operate within voltage range of 1.4V-3.6V. Direction-control (DIR) and outputenable (OE) inputs determine which direction the device transmits data. LCD signals
from the main expansion headers are at 3.3V level and the buffered output from the
74AVC32T245 are also at 3.3V; thus, no voltage stepping up or down is needed. Figure
10 shows the LCD signals buffered through 74AVC32T245.
Figure 10.
5.2.3
Bus Transceiver
Digital Transmitter
TFP410 is a digital transmitter which transmits LCD signals to the HDMI port. The DVI
power down signal is connected to the active-low power down pin (PD) of the
transmitter. The TFP410 transmits three pairs of differential signal outputs and one pair
of differential output clock to the HDMI connector. The EDID I2C signals that goes to
the HDMI connector is at 5V; thus, a 2-bit bi-directional voltage translator
TXS0102DCU is required to step up the EDID I2C signals from main expansion header
P2 to 5V. Figure 11 shows the TFP410 and TXS0102DCU in the schematic.
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BeagleBone DVI-D Cape
Figure 11.
5.3
System Reference Manual
Revision A2
Digital Transmitter and 2-Bit Voltage Translator
EEPROM
The BeagleBone DVI-D Cape has an EEPROM containing information that will allow
the SW to identify the board and to configure the expansion headers pins as needed.
EEPROMs are required for all Capes sold in order for them to operate correctly when
plugged in the BeagleBone.
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BeagleBone DVI-D Cape
System Reference Manual
Revision A2
The EEPROM used on this cape is the same one as is used on the BeagleBone, a
CAT24C256. The CAT24C256 is a 256 kb Serial CMOS EEPROM, internally organized
as 32,768 words of 8 bits each. It features a 64-byte page write buffer and supports the
Standard (100 kHz), Fast (400 kHz) and Fast-Plus (1 MHz) I2C protocol. Figure 14 is
the design of the EEPROM circuit.
Figure 12.
5.3.1
BeagleBone DVI-D Cape EEPROM
EEPROM Address
In order for each Cape to have a unique address, a board ID scheme is used that sets the
address to be different depending on the order in which it is stacked onto the main board.
A two position dipswitch or jumpers is used to set the address pins of the EEPROM. It is
the responsibility of user to set the proper address for each board. Address line A2 is
always tied high. This sets the allowable address range for the expansion cards to 0x54 to
0x57.All other I2C addresses can be used by the user in the design of their Capes. But,
these addresses must not be used other than for the board EEPROM information.
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BeagleBone DVI-D Cape
5.3.2
System Reference Manual
Revision A2
I2C Bus
The EEPROMs on each expansion board is connected to I2C2. For this reason I2C2 must
always be left connected and should not be changed by SW to remove it from the
expansion header pin mux. The I2C signals require pull-up resistors. Each board must
have a 5.6K resistor on these signals. With four resistors this will be an affective
resistance of 1.4K if all Capes were installed.
5.4
User LED’s
The BeagleBone DVI-D Cape features two user LED’s which are same as D2 and D3 on
the BeagleBone boards. These two LED’s can be access via GPIO pins on the processor.
Figure 13 shows the LED circuitry.
Figure 13.
User LED’s
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BeagleBone DVI-D Cape
System Reference Manual
Revision A2
Q1 provides level shifting from the processor to drive the LED’s that are connected to
SYS_5V rail.FB8 provides noise immunity to the system by the LED’s which can be a
source of noise back into the system rail. Each LED is controlled by settings the
appropriate GPIO bit HI. At power up all LED’s are off. Table 3 is the GPIO User LED
assignments.
Table 3.
LED
User 0
User 1
User LED Control
GPIO
GPIO1_21
GPIO1_22
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BeagleBone DVI-D Cape
System Reference Manual
6.0
Mechanical Information
6.1
BeagleBone DVI-D Cape Dimensions
Revision A2
This section provides information on the mechanical aspect of the BeagleBone DVI-D
Cape. Figure 14 is the dimensions of the BeagleBone DVI-D Cape.
Figure 14.
6.2
BeagleBone DVI-D Cape Dimensions Drawing
DVI_PDn Jumper
On BeagleBone DVI-D Cape Rev A there is a jumper connecting from pin 42 of
connector P2 to R91 (which is DNI). This is the DVI_PDn signal that goes from the main
connector to the DVI-D driver unit on the board. The PCBs of these boards are labeled
“PCB Rev A” in the back. Future releases (A1 and later) of BeagleBone DVI-D Cape had
their PCB modified so no more jumpers are required.
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BeagleBone DVI-D Cape
7.0
System Reference Manual
Revision A2
Design Materials
Design information can be found at BeagleBoardToys wiki:
http://beagleboardtoys.com/wiki/index.php?title=BeagleBone_DVI-D
Provided there is:
- Schematic in PDF
- Schematic in OrCAD
- Manufacturing files
o PCB Gerber
o PCB Layout (Allegro)
- Bill of Materials
- System Reference Manual (This document)
These design materials are *NOT SUPPORTED* and DO NOT constitute a reference
design. Only “community” support is allowed via resources at BeagleBoard.org/discuss.
THERE IS NO WARRANTY FOR THE DESIGN MATERIALS, TO THE EXTENT
PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN
WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE
DESIGN MATERIALS “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
DESIGN MATERIALS IS WITH YOU. SHOULD THE DESIGN MATERIALS PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR
OR CORRECTION.
We mean it, these design materials may be totally unsuitable for any purposes.
Page 29 of 29
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