Matrix Orbital GTT480272A User manual

GTT480272A
Hardware Manual
Revision 1.5
PCB Revision: 1.4 or Higher
Firmware Revision: 1.0 or Higher

Revision History
Revision
Date
Description
Author
1.5
August 21st, 2012
Updated I2C Section
Clark
1.4
March 10th, 2011
Restricted Temperature Rating
Clark
1.3
August 24th, 2010
Additional Heading Numbers and Additional Formatting
Clark
1.2
July 28th, 2010
Added Defect Criteria
Clark
1.1
July 22nd, 2010
Added GTT Support Tools to Software Section
Clark
1.0
June 23rd, 2010
Initial Release
Clark
0.4
Header description image and table change per Henry
Clark
0.3
Revisions as per task #266
Clark
0.2
Style Updates
Clark
0.1
Initial Concept
JM

Contents
1Introduction .......................................................................................................................................... 1
2Quick Connect Guide ............................................................................................................................ 2
2.1 Available Headers ......................................................................................................................... 2
2.2 Standard Module .......................................................................................................................... 3
2.2.1 Recommended Parts............................................................................................................. 3
2.2.2 Serial Connections................................................................................................................. 3
2.3 I2C Module.................................................................................................................................... 4
2.3.1 Recommended Parts............................................................................................................. 4
2.3.2 I2C Connections ..................................................................................................................... 4
2.4 USB Module .................................................................................................................................. 5
2.4.1 Recommended Parts............................................................................................................. 5
2.4.2 USB Connections................................................................................................................... 5
2.5 RS422 Module............................................................................................................................... 6
2.5.1 RS422 Connections................................................................................................................ 6
3Software................................................................................................................................................ 7
3.1 GTT Support Tools......................................................................................................................... 7
3.2 Application Notes.......................................................................................................................... 7
4Hardware............................................................................................................................................... 8
4.1 Standard Model............................................................................................................................. 8
4.1.1 Extended Communication/Power Header ............................................................................ 8
4.1.2 Alternate Serial Header......................................................................................................... 8
4.1.3 Protocol Select Jumpers........................................................................................................ 8
4.2 I2C Model...................................................................................................................................... 9
4.2.1 Standard Communication/Power Header............................................................................. 9
4.2.2 Mini USB Communication Connector ................................................................................... 9
4.3 USB Model...................................................................................................................................10
4.3.1 Mini USB Communication Connector .................................................................................10
4.3.2 Alternate USB Communication Header...............................................................................10
4.4 RS422 Model............................................................................................................................... 10
4.4.1 RS422 Header...................................................................................................................... 10
4.5 Common Features....................................................................................................................... 11

4.5.1 Mass Storage Mini USB Connector .....................................................................................11
4.5.2 SD Memory Card ................................................................................................................. 11
4.5.3 Mass Storage Mode ............................................................................................................11
4.5.4 Field Upgrade ......................................................................................................................11
5Troubleshooting ..................................................................................................................................12
5.1 Power .......................................................................................................................................... 12
5.2 Display......................................................................................................................................... 12
5.3 Communication........................................................................................................................... 12
5.4 Factory Defaults ..........................................................................................................................13
6Appendix .............................................................................................................................................14
6.1 Optical Characteristics.................................................................................................................14
6.2 Environmental Characteristics ....................................................................................................14
6.3 Touch Specifications.................................................................................................................... 14
6.4 Power Consumption.................................................................................................................... 14
6.5 ESD Performance.........................................................................................................................14
6.6 Electrical Characteristics .............................................................................................................14
6.6.1 Absolute Maximum Ratings ................................................................................................14
6.6.2 Communication Characteristics ..........................................................................................15
6.7 Defect Criteria............................................................................................................................. 15
6.7.1 Display Specifications.......................................................................................................... 15
6.7.2 Appearance Specifications ..................................................................................................15
6.8 Dimensional Drawing ..................................................................................................................16
7Ordering ..............................................................................................................................................17
7.1 Part Numbering Scheme ............................................................................................................. 17
7.2 Options........................................................................................................................................17
7.3 Accessories..................................................................................................................................17
8Definitions...........................................................................................................................................18
9Contact................................................................................................................................................18

1
1Introduction
Figure 1: GTT480272A Display
The Matrix Orbital GTT480272A is a full colour TFT display with an integrated touch screen crafted to
become a crisp, controllable canvas for creativity. Utilizing an extended version of our widely used
command protocol and industry standard communication protocols, the customizable GTT480272A will
quickly become the gorgeous face of your application.
Seamless incorporation of a touch screen provides sleek user input while a small piezo speaker can offer
audio feedback for a completely interactive experience. Storage of fonts and bitmaps within the
swappable onboard SD memory card allow for a co-ordinated appearance in any design.
The elegant simplicity of the familiar Matrix Orbital command structure now provides updates to the
user and flow control for full two-way communication. Also new are animations, moving at an amazing
25 frames per second, automated display initialization, and field upgradeability.
Available flow controlled RS232 and TTL interfaces provide versatile communication schemes for the
standard model, while I2C and USB versions ensure that any controller can have a beautiful user
interface. Scorching fast communication speeds, up to 115kbps in serial modes and 100kbps in I2C,
ensure important information is relayed on time.
The innovativeGTT480272A, with all of the features mentioned above, is available in various voltage and
communication options to provide a sleek touch of creativity to any project.

2
2Quick Connect Guide
2.1 Available Headers
Figure 2: GTT480272A Header Locations
Table 1: List of Available Headers
#
Header
Mate
Population
1
Extended Communication/Power
ESCCPC5V
Standard Model Only
1
Standard Communication/Power
BBC
I2C Model Only
2
USB Communications
EXTMUSB3FT/ INTMUSB3FT
USB/I2C Models Only
3
Alternate USB
None Offered
Contact Sales to Request
4
Alternate Serial
None Offered
Contact Sales to Request
5
Mass Storage Configuration Jumper
JMPR
All Models
6
SD Card
Micro SD Card
All Models
7
USB Mass Storage
EXTMUSB3FT/ INTMUSB3FT
All Models
8
RS422 Terminal Block
16-30 AWG Wire
RS422 Model Only

3
2.2 Standard Module
The standard version of the GTT480272A allows for user configuration of two common communication
protocols. The unit can communicate using flow controlled serial protocol at either RS323 or TTL voltage
levels. Connections for each are accessed through the communication/power header as in Table 2.
2.2.1 Recommended Parts
Figure 3: Extended Communication/Power
Cable (ESCCPC5V)
The most common cable choice for the GTT480272A display, the
Extended Communication/ Power Cable, offers a simple connection to
the unit with familiar interfaces. A DB9 and floppy power header
provide all necessary input to drive your display.
Figure 4: Internal Communication/Power
Cable (ISCCPC5V)
For an internal PC interface to the GTT480272A, an Internal Serial
Communication/Power Cable can be used. In this case, internal serial
and floppy power headers provide the input to drive your display.
2.2.2 Serial Connections
The serial interface provides a classic connection to the GTT480272A. The Extended
Communication/Power Cable is most commonly used for this set up as it provides connections for DB9
serial and floppy power cables. To place your board in Serial mode, adhere to the steps below.
1. Set the Protocol Select jumpers.
RS232: Connect the five jumpers in the 232*protocol box with the zero ohm jumper resistors
provided or an alternate wire or solder solution.
TTL: Connect the four jumpers in the TTL*protocol box.
*Note: Jumpers must be removed from all protocol boxes save for the one in use.
2. Make the connections.
a. Connect the six pin female header of the Extended Communication/Power Cable to the
communication/power header of your GTT480272A.
b. Insert the male end of your serial cable to the corresponding DB9 header of the Extended
Communication/Power Cable and the mate the female connector with the desired
communication port of your computer.
c. Select an unmodified floppy cable from a PC power supply and connect it to the power header
of the Extended Communication/Power Cable.
3. Create.
GTT Tools will serve to get you started, and then allow you to move on with your own
development. Instructions for this program can be found below and a variety of application
notes are linked in the Application Notes Section of this manual.

4
2.3 I2C Module
The I2C version of the GTT480272A offers both a standard 4 pin I2C connection as well as a USB header
for debugging purposes without the need to muck about with hardware changes. A simple I2C.cfg file in
the SYSTEM folder will tell the unit to respond on the I2C bus, with it missing it will respond via USB.
Connections for each protocol can be found in the I2C Model hardware section.
2.3.1 Recommended Parts
Figure 5: Extended Breadboard Cable (BBC)
For a more flexible interface to the GTT480272A-I2C, a Breadboard
Cable may be used. This provides a simple four wire connection that is
popular among developers for its ease of use in a breadboard
environment.
Figure 6: Communication/Power Cable
(SCCPC5V)
The Communication/ Power Cable offers a simple connection to the
GTT480272A-I2C with familiar interfaces. DB9 and floppy power
headers provide all necessary input to drive your display.
2.3.2 I2C Connections
A more advanced connection to the GTT480272A is provided by the I2C setting. This requires a
connection directly to your project which is best accomplished using a breadboard and the Breadboard
Cable. Power must be supplied from your breadboard or another external source. To dive right into
your application and use the GTT480272A in I2C mode, get started with the guidelines below.
1. Set the Protocol Select switches.
I2C: Ensure that the two I2C jumpers in the corresponding protocol box are connected while all
others, save USB, are open.
2. Make the connections.
a. Connect the Breadboard Cable to the Standard Communication/Power header on your
GTT480272A and plug the four leads described below into your breadboard. The red lead will
require power, while the black should be connected to ground, and the green and yellow should
be connected to your controller clock and data lines respectively.
b. Pull up the clock and data lines to five volts using a resistance between one and ten kilohms on
your breadboard.
3. Create.
This time you're on your own. While there are many examples linked within the Application
Notes Section of this manual, too many controllers and languages exist to cover them all. If you
get stuck in development, it is possible to switch over to another protocol on the standard
board, and fellow developers are always on our forums for additional support.

5
2.4 USB Module
The GTT480272A-USB offers a single USB interface for easy connection to a host computer. This simple
but common protocol can be accessed using the on board mini B style USB connector as outlined below.
2.4.1 Recommended Parts
Figure 7: Mini-B USB Cable
(EXTMUSB3FT)
The External Mini USB Cable is recommended for the GTT480272A-USB
display. It will connect to the miniB style header on the unit and provide a
connection to a regular A style USB connector, commonly found on a PC.
2.4.2 USB Connections
The USB connection is the quickest, easiest solution for PC development. After driver installation, the
GTT480272A-USB will be accessible through a virtual serial port, providing the same result as a serial
setup without the cable hassle. To connect to your GTT480272A-USB please read below.
1. Set the Protocol Select jumpers.
USB: The GTT480272A-USB offers USB protocol only. Model specific hardware prevents this unit
from operating in any other protocol, and does not allow other models to operate in the USB
protocol. Protocol Select jumpers on the USB model cannot be moved.
2. Make the connections.
Plug the mini-B header of your external mini USB cable into your GTT480272A-USB and the
regular USB header into your computer USB jack.
3. Install the drivers.
a. Download the latest drivers at www.matrixorbital.ca/drivers, and save them to a known location.
b. When prompted, install the USB bus controller driver automatically
c. If asked, continue anyway, even though the driver is not signed
d. When the driver install is complete, your display will turn on, but communication will not yet be
possible.
e. At the second driver prompt, install the serial port driver automatically
f. Again, if asked, continue anyway
4. Create.
Use uProject or hyperterminal to get started, and then move on with your own development.
Instructions for these programs can be found below and a number of application notes are
linked in the Application Notes Section of this manual.

6
2.5 RS422 Module
The GTT480272A-422 provides an industrial alternative to the standard RS232 communication protocol.
Rather than single receive and transmit lines, the RS422 model uses a differential pair for each receive
and transmit signals to reduce degradation and increase transmission lengths. The RS422 signals are
available in a six pin connector as seen in Table 6.
2.5.1 RS422 Connections
To interface to the robust GTT480272A-422, a series of six wires are usually screwed into the RS422
terminal block provided. This setup will supply power to your display and provide a simple
communication scheme. To connect in RS422 mode, adhere to the steps below.
1. Set the Protocol Select jumpers.
RS422: The GTT480272A-422 offers only RS422 protocol and does not require any jumper
changes. Model specific hardware prevents this unit from operating in any other protocol,
and does not allow other models to operate in the RS422 protocol.
2. Make the connections.
a. Screw one wire; sized 16 to 30 on the American Wire Gauge, into each of the six terminal
block positions.
b. Connect the Vcc wire to the positive terminal of your power supply and the GND terminal to
the negative or ground lead to provide appropriate power as in Table 11.
c. Secure the A and B wires to your non-inverting and inverting output signals respectively,
while attaching the Z and Y wires to your inverting and non-inverting inputs.
3. Create.
In a PC environment, GTT Tools will serve to get you started. In addition, a variety of
application notes are available online in a number of different languages to aid in the
development of a display controller. Instructions for the program can be found below and
the examples linked in the Application Notes are great code references.

7
3Software
The multiple communication protocols available and simple command structure of the GTT480272A
means that a variety of applications can be used to communicate with the display. Text is sent to the
display as a character string, for example, sending the decimal value 41 will result in an 'A' appearing on
the screen. A number of control characters are also activated. Advanced commands are merely values
prefixed with a special command byte, 254 in decimal. While many software programs are available to
communicate with the GTT480272A, a number of more common samples are detailed in depth below.
Table 21: Reserved Control Characters
Control Characters
7
Bell / Beep
10
Line feed / New line
13
Carriage return
3.1 GTT Support Tools
Downloaded from http://www.matrixorbital.ca/software/, the GTT Project support tool provides a
simple graphic interface with the full library of GTT series commands. This program allows users to drag
and drop commands into a list that can be transmitted to the GTT, saved, and even loaded for later use.
Figure 8: GTT Support Tools
As you can see, each command added is displayed its name, any applicable parameters, and finally, a
byte by byte account of the information that will be sent in decimal notation. While this list of
commands can be saved and recalled later, it can also be converted into a binary file using the save as
feature. This will allow easy creation of AUTOEXEC startup files, and integration into application specific
code. Finally, the support tool provides a debug window that will display the information flow to and
from your GTT to ensure your command list executes exactly as it was envisioned.
3.2 Application Notes
Full demonstration programs and code are available for Matrix Orbital displays from Matrix Orbital
Application Note section at www.matrixorbital.ca/appnotes. These programs are meant to showcase the
capability of the display and are not intended to be integrated into a final design. For additional
information regarding code, please read the “On Code”document also found on the support site.

8
4Hardware
4.1 Standard Model
4.1.1 Extended Communication/Power Header
Figure 9: Extended Communication/Power Header
Table 2: Extended Communication/Power Pinout
Pin
Function
6
RTS
5
CTS
4
Gnd
3
Tx (SDA)
2
Rx (SCL)
1
Vcc
The Extended Communication/Power Header provides a standard connector for interfacing to the
GTT480272A. Voltage is applied through pins one and four of the header. Please ensure the correct
voltage input for your display by referencing the electrical specifications in Table 11 before applying
power. Pins two and three are reserved for serial transmission using either RS-232/TTL levels, depending
on what has been selected by the Protocol Select Jumpers. Pins five and six are used for serial
transmission hardware flow control. Please note that unlike older Matrix Orbital displays, hardware flow
control is mandatory for serial communications in RS232 or TTL modes. The Serial Molex 22-04-1061
style header used can be mated to a number of connectors.
4.1.2 Alternate Serial Header
Advanced applications may prefer the straight two by five pin connection offered through the optional
Alternate Serial Header. The Alternate Serial Header may be added to the GTT480272A for an added
charge as part of a custom order. Please use the Contact section to reach Sales for additional details.
4.1.3 Protocol Select Jumpers
The Protocol Select Jumpers provide the means necessary to alter the standard GTT480272A
communication setting between RS-232 and TTL. As a default, the jumpers are set to RS-232 mode with
solder jumps on the RS232 jumpers. In order to change the display to TTL mode, simply remove the zero
ohm resistors from the RS232 jumpers and solder them to the TTL jumpers.

9
4.2 I2C Model
4.2.1 Standard Communication/Power Header
Figure 10: Extended Communication/Power Header
Table 3: Standard Communication/Power Pinout
Pin
Function
1
Vcc
2
Rx (SCL)
3
Tx (SDA)
4
Gnd
The Standard Communication/Power Header provides a more simplistic connection to the GTT480272A-
I2C. Voltage is applied through pins one and four of the header. Again, please ensure the correct voltage
input for your display by referencing the electrical specifications in Table 11 before applying power. Pins
two and three are reserved for clocking data through the I²C protocol. Pins five and six are used for
serial transmission hardware flow control, and ignored for I²C communications. The Tyco 640456-4-LF
style headers used can be mated to a number of connectors.
4.2.2 Mini USB Communication Connector
Figure 11: Mini USB Connector
Table 4: Mini USB Pinout
Pin
Function
1
Vcc
2
D-
3
D+
5
Gnd
The GTT480272A-I2C also comes with a Mini-B USB connector for development and debugging
purposes. By removing the I2C.cfg file from the SYSTEM directory, the GTT480272A-I2C can be
interfaced to a PC through a standard USB cable. This connection creates a virtual com port that offers a
proven communication scheme while developing in I2C.

10
4.3 USB Model
4.3.1 Mini USB Communication Connector
Figure 12: Mini USB Connector
Table 5: Mini USB Pinout
Pin
Function
1
Vcc
2
D-
3
D+
5
Gnd
The GTT480272A-USB comes with a familiar Mini-B USB connector to fulfill both communication and
power needs. The GTT480272A-USB can be connected to virtually any other USB host using the
appropriate cable. Most commonly used with a PC, this connection creates a virtual com port that offers
a simple power solution with a familiar communication scheme.
4.3.2 Alternate USB Communication Header
Some advanced applications may prefer the straight four pin connection offered through the optional
Alternate USB Header. The Alternate USB Header may be added to the GTT480272A-USB for an added
charge as part of a custom order. Please use the Contact section to reach Sales for additional details.
4.4 RS422 Model
4.4.1 RS422 Header
Figure 13: RS422 Header
Table 6: RS422 Pinout
Pin
Function
1
Gnd
2
Rx (Y)
3
Inv Rx (Z)
4
Inv Tx (B)
5
Tx (A)
6
Vcc
The six pin RS422 Header of the GTT480272A-422 offers power and ground connections as well as two
differential pair communication lines. Both a regular and an inverted line are provided for both receive
and transmit signals. The Tyco 282834-6 style header is best suited to a wire connection.

11
4.5 Common Features
4.5.1 Mass Storage Mini USB Connector
Figure 14: Mass Storage USB Connector
Table 7: Mass Storage USB Pinout
Pin
Function
1
Vcc
2
D-
3
D+
5
Gnd
The GTT480272A comes with a secondary Mini USB connector to access the SD memory card as a mass
storage device for easier access to the files contained on the card. The mass storage jumper must be
placed to use this function, please refer to the Mass Storage Mode section for further information.
4.5.2 SD Memory Card
The SD Memory Card is used to store all user fonts, bitmaps, 9-slices, animations and start-up settings.
The start-up settings are stored in a binary file called AUTOEXEC. This file contains a simple stream of
characters stored just as they would be if they were sent to the display at runtime, this will store all the
commands to change the initial settings for your application. Start-up settings are stored in this location
alone; therefore, simply removing the AUTOEXEC file will restore the display to factory defaults.
Please refer to the Protocol Manual at http://www.matrixorbital.ca/manuals/GTT Series/ for a complete
list of available commands executable not only at start up but runtime as well.
4.5.3 Mass Storage Mode
With a jumper placed on the mass storage side of the mode selector, the unit will power up in mass
storage mode. Placing a jumper on the USB mass storage header labelled ”A”, the unit will appear to any
PC as a mass storage device, giving you access to the contents of the SD memory card directly.
Please note, the speed of data transfers in mass storage mode is limited, and is only intended to be used
in situations where an external SD memory card reader is not available.
4.5.4 Field Upgrade
After release, Matrix Orbital may publish updates to the GTT code base or functionality that can be easily
applied to the unit in the field. While in Mass Storage Mode replace all of the files in the GTT upgrade
folder with the latest package available from www.matrixorbital.ca/software/GTT/. Then, cycle power to
the unit, wait for the upgrade to complete, and allow the screen to reboot. Finally, replace the GTT in
your application and enjoy the new additions to the display you’ve come to know and love.

12
5Troubleshooting
5.1 Power
In order for your Matrix Orbital display to function correctly, it must be supplied with the appropriate
power. If the power LED near the top right corner of the board is not illuminated, power is not applied
correctly. Try the tips below.
First, check the power cable which you are using for continuity. If you don't have an ohm
meter, try using a different power cable, if this does not help try a different power supply.
If changes have been made to the protocol select block, ensure all the appropriate protocol
select jumpers are connected and all unused protocol jumpers are disconnected.
The last step will be to check the power connector in use on your display. If the connector
has become loose or you are unable to resolve the issue, please use the Contact section to
reach a friendly Matrix Orbital support representative.
5.2 Display
If your display is powered successfully without an AUTOEXEC file present, the Matrix Orbital logo, or user
created screen should display on start up. If this is not the case, check out these tips.
If any start-up issues are encountered, it is recommended that you remove the AUTOEXEC
file from the SD card to allow the unit to start with factory defaults.
5.3 Communication
When communication of either text or commands is interrupted, try the steps below.
First, check the communication cable for continuity. If you don't have an ohm meter, try
using a different communication cable. If you are using a PC try using a different Com Port.
In USB protocol, ensure that a connection is made to the header labelled USB, not Mass
Storage and check that the mode selection jumper is placed on the “B” side.
Next, please ensure that the display module is set to communicate on the protocol that you
are using, by checking the Protocol Select Jumpers.
In serial protocol, ensure that the host system and display module are both communicating
on the same baud rate. The default baud rate for the display module is 115,200 bps.
Match Rx from the display to the transmit pin from your host and the Tx pin to receive.
If you are communicating to the display via I²C*please ensure that the data is being sent to
the address defined in your I2C.cfg file. The default slave address is decimal 80 (0x50 hex).
In I2C mode, connect SDA to the data line of your controller and SCL to the clock output.
Unlock the display. See the Set and Save Data Lock command for more info.
*Note: I²C communication will always require pull up resistors on SCL and SDA of one to ten kilohms.

13
5.4 Factory Defaults
If the settings of your display become altered in a way that dramatically impacts usability, the default
settings can be temporarily restored simply by removing the AUTOEXEC file in the memory card’s root
directory. This will reset the baud rate to 115,200.

14
6Appendix
6.1 Optical Characteristics
Table 8: Optical Characteristics
Module Size
133.00 x 78.0 x 21.7
mm
Viewing Area
97.60 x 56.40
mm
Pixel Arrangement
RGB vertical Stripe
Pixel Size
0.066 x 0.198
mm
Pixel Pitch
0.198 x 0.198
mm
Luminance
500
cd/m2
Viewing Angle
80° Left
80° Right
60° Up
80° Down
Contrast Ratio
500:1
6.2 Environmental Characteristics
Table 9: Environmental Specifications
Operating Temperature
0°C to +50°C
Storage Temperature
-20°C to +70°C
Operating Relative
Humidity*
95% (T < 40°C)
85% (40°C < T < 50°C)
*Note: No condensation at any temperature
6.3 Touch Specifications
Table 10: Touch Screen Attributes
Screen Hardness
3.0
H
Required Operating Force
1.177
N
6.4 Power Consumption
Table 11: Required Supply Voltage
Parameter
Min
Typ
Max
Unit
Remarks
Supply
Voltage
4.75
5.0
5.25
V
Standard Voltage
9.0
12.0
35.0
V
Extended Wide
Voltage (-VPT)
Table 12: Operating Current Draw
Parameter
Min
Typ
Max
Unit
Remarks
Logic
-
190
-
mA
Backlight Off
Backlight
-
265
-
mA
Full Brightness
6.5 ESD Performance
Table 13: ESD Resistance Data
Component
Value
Unit
Remarks
Serial Translator
(RS232, RS422)
±15
kV
Human Body Model
±15
kV
Air Gap
(IEC 1000-4-2)
±8
kV
Contact
(IEC 1000-4-2)
Controller (I2C, TTL)
±2
kV
Human Body Model
6.6 Electrical Characteristics
6.6.1 Absolute Maximum Ratings
Table 14: GTT480272A Limiting Values
Parameter
Min
Max
Unit
Remarks
Supply Voltage
-0.5
6
V
Standard Voltage Option
-0.5
35
V
Extended Wide Voltage (-VPT) Option
RS232 Pins
-25
25
V
Input Signals
-13.2
13.2
V
Output Signals
RS422 Pins
-13
13
V
Inverting and Non, Input and Output Signals
I2C/TTL pins
-0.5
6.0
V
SCL, SDA, Input and Output Signals
USB Pins
-0.5
3.8
V
Input and Output Signals

15
6.6.2 Communication Characteristics
Table 15: RS232 Interface Characteristics
Parameter
Min
Typ
Max
Unit
Input Threshold Low
0.6
1.2
-
V
Input Threshold High
-
1.5
2.4
V
Output Voltage Swing
±5.0
±5.4
-
V
Input Resistance
3
5
7
kΩ
Output Resistance
300
10M
-
Ω
Output Short Circuit Current
-
±35
±60
mA
Table 16: USB Interface Characteristics
Parameter
Min
Typ
Max
Unit
Static Outut High
2.8
-
3.6
V
Static Output Low
-
-
0.3
V
Input Differential Threhold
0.2
-
-
V
Common Mode Output Voltage
0.8
-
2.5
V
Driver Output Impedance
26
29
44
Ω
Table 17: TTL Interface Characteristics
Parameter
Min
Typ
Max
nit
Input Threshold Low
-
0
0.8
V
Input Threshold High
2.0
3
5.5
V
Outut Voltage Low
-
0
0.4
V
Output Voltage High
2.9
3
3.3
V
Output Short Circuit Current
-
-
±50
mA
Table 18: I2C Interface Characteristics
Parameter
Min
Typ
Max
Unit
Input Threshold Low
-
0
0.3
V
Input Threshold High
0.7
5
-
V
Output Voltage Low
-
0
0.4
V
Output Short Circuit Current
-
-
±50
mA
Table 19: RS422 Interface Characteristics
Parameter
Min
Typ
Max
Unit
Remarks
Input Voltage (A and B)
-7.0
-
12.0
V
Input Differential Threshold
-200
-125
-50
mV
-7V < Vin < +12V
Differential Driver Output
2
-
3.3
V
RL = 100Ω
Common Mode Output Voltage
-
1.65
3
V
Input Resistance
96
-
-
kΩ
-7V < Vin < +12V
Driver Short Circuit Current Limit
-
-
250
mA
Receiver Output Short Circuit Current
-
-
95
mA
6.7 Defect Criteria
6.7.1 Display Specifications
Table 20: Display Defect Criteria
Defect
Condition
Criteria
Line
Not Allowed
N/A
Bright
Dots
Red + Green + Blue
≤ 3 Dots
Green
≤ 1 Dots
Within φ10mm Circle
≤ 1 Dots
Dots within Adjaent Pixels
0 Sets
Dark
Dots
Red + Green + Blue
≤ 3 Dots
Dots within 2 Adjacent Pixels
0 Sets
Total
Bright Dots + Dark Dots
≤ 4 Dots
6.7.2 Appearance Specifications
Table 21: Screen and Touch Defect Criteria
Defect*
Condition
Critera
Circular
Objects
(Stains, Dust, Dent,
Bubble, Dark/White
spot, Foreign matter)
d < 0.2mm
Allowed
0.2mm ≤d < 0.4mm
≤4points
d ≥ 0.4mm
0points
Rectangular
Objects
(Stains, Dust)
W≤0.1mm + L<0.5mm
Allowed
W≤0.1mm + 0.5mm≤L<2.5mm
≤4points
W>0.1mm, L≥2.5mm
0points
Scratches
W≤0.05mm + L≤2.0mm
Allowed
W>0.05mm, L>2.0mm
0points
*Note: Defects must occur in Active Area

16
6.8 Dimensional Drawing
Figure 15: GTT480272A Dimensional Drawing