Landmark MG21 User manual

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Landmark Technology Inc.
MG21 LCD Controller
For
TFT LCDs with Resolution up to 1,280 x 1,024
(Version A)
August 8, 2008

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1. Introduction
MG21 is a compact size LCD controller with analog RGB (VGA) and DVI inputs. It uses the
Genesis gm5621 chip and supports TFT LCD modules up to SXGA (1,280 x 1,024) native
resolutions (1.31 MPixels) with 16,777,216 colors.
For video inputs beyond the SXGA (1280 x 1024) resolution, the MG21 down scales the input
video to the native resolution of the LCD, and then displays the image over the screen. It supports
video input all the way to WUXGA (1920 x 1200).
To Proceed:
A. Make sure to use the correct parts and refer to Fig. 4- the system connection diagram, to
connect the MG21 card to the LCD correctly.
B. Refer to this User’s Guide for operating procedures and cautions
Important Notes – This product is designed for system developers and integrators. The
manufacturer accepts no liability for damage or injury caused by the use of this product. It is the
responsibility of the system developers, integrators, and other users to ensure:
A. All required and appropriate safety measures are properly implemented.
B. Obtain regulatory approvals as needed.
C. Check power specifications and connections before turning on the power
2. Features:
3. MG21 Mechanical Dimensions
The dimensions of the main controller board and its connectors are shown in Fig. 2:
Input Video Signal Analog RGB (0.7 Vp-p), Digital RGB (DVI)
Supported Resolution DOS, VGA, SVGA, XGA, SXGA, WXGA, UXGA, WUXGA
Color Depth 24 bits (16.8 million) colors
H-Sync Range 30 - 80 KHz
V-Sync Range 60 - 75 Hz
LCD Interface LVDS
LCD Voltage Supported 3.3V / 5V / 12V
Audio Output Power 2 Watts x 2 Channels
Plug & Play Supported
Power Input 12V (± 0.6V) DC
Power Mode Normal & Power Saving
Power Consumption Normal, 3 Watts typ. w/o load. Power Saving, < 1 Watt
Controller Dimensions 110 mm x 82 mm x 14 mm ( H max)
OSD Board Dimensions 104 mm x 22 mm
Operating Temp. Range 0 to 60 degree C
Humidity 90% R.H. Max.

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GENESIS
gm5621
5
73 82
110
100 5
CN8
VGA
CN200
CN401
CN6
CN300
CN201
CN501
CN600
DVI
Audio
Input
Power
Input
Audio Output
ToInverter
To OSD BoardLVDS
Fig.2
The dimensions of the OSD board and its connectors are show in Fig. 3.
Fig. 3 OSD Board Dimensions
Power Menu
-+
DownUp
4 Φ, 2 holes 97.3
18.2
Dimensions are in mm
104.5
22.0
10.2 22.8
35.4 50.3
65.3 80.2
95.4
6.0
LED
CN1 CN2

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There are two connectors on the OSD board. CN1 is for the cable connecting the OSD board to the
main controller board. The 3-pin connector CN2 is for a IR sensor board for OSD adjustment with a
remote control. This feature is not implemented in Version A MG21 controller.
4. System Connection
The typical connection diagram of the MG21 LCD controller to Landmark VHB LCD modules is
illustrated in Fig. 4.
MG21
LCD
Connector
Inverter
OSD board
Power
Supply
Dimming & On/Off control
Inverter Power
Power in (12V)
LCD cable
To VHB
Backlight
VHB LCD
Module
Fig. 4
- Typical Connection Diagram from the MG22 to a Landmark VHB LCD and the Inverter
GENESIS
gm5621
CN8
VGA
CN200
CN401
CN6
CN300
CN201
CN501
CN600
DVI
Audio
Input
Power
Input
ToInverter
To OSD BoardLVDS

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Cautions:
A. The inverter power should go directly from the power supply as shown in Fig. 4. The 12V from
the connector CN5 cannot carry the heavy inverter current load to run the VHB backlight.
B. Never connect or disconnect any parts of the system while the power is turned on as doing so
may cause serious damages to the MG21 controller and other parts.
5. Video Modes Supported
Mode Resolution fH(KHz) fV(Hz)
31.5 60
37.9 72
VGA 640 x 480
37.5 75
VGA 640 x 400 31.5 70
VGA 720 x 400 31.5 70
37.9 60
48.1 72
SVGA 800 x 600
46.9 75
48.4 60
56.5 70
XGA 1024 x 768
60.0 75
64.0 60
SXGA 1280 x
1024 80.0 75
6. Connectors and Pin Assignments
The connectors on the MG21 card and their functions are listed below:
CN6 12V power input
CN8 Inverter interface
CN300 OSD connection
CN401 LVDS Interface
CN200 DVI input
CN201 VGA, 15-pin D-sub connector
CN501 Audio input (Reserved for Version B)
CN600 Audio output (Reserved for Version B)
The pin Assignments of the connectors besides the standard ones (such as VGA and DVI) are listed
below:
CN6 – for Power Input
Pin # Symbol Description
1 GND Ground
2 GND Ground
3 12V 12 Volt DC power input
4 12V 12 Volt DC power input

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CN8 – Inverter Connector
Pin # Symbol Description
1 12V 12V DC power output
2 12V 12V DC power output
3 On/Off Inverter On/Off control
4 Adj Inverter brightness control
5 GND Ground
6 GND Ground
Cautions – The 12V power on CN8 can run inverters for regular brightness LCDs. It does not
have the current capability to run Landmark Inverters for VHB backlights. Please follow Fig.
4 on page 4 for the connections to run very high brightness LCDs.
CN401 (30 Pins/2.0 mm) – LVDS Interface
Pin No Symbol Description
1 VCC Power
2 VCC Power
3 VCC Power
4 VCC Power
5 GND Ground
6 GND Ground
7 RxO0- Negative LVDS differential data, CH0 (Odd data)
8 RxO0+ Positive LVDS differential data, CH0 (Odd data)
9 RxO1- Negative LVDS differential data, CH1 (Odd data)
10 RxO1+ Positive LVDS differential data, CH1 (Odd data)
11 RxO2- Negative LVDS differential data, CH2 (Odd data)
12 RxO2+ Positive LVDS differential data, CH2 (Odd data)
13 GND Ground
14 GND Ground
15 RxOC- Negative LVDS differential clock, (Odd clock)
16 RxOC+ Positive LVDS differential clock, (Odd clock)
17 RxO3- Negative LVDS differential data, CH3 (Odd data)
18 RxO3+ Positive LVDS differential data, CH3 (Odd data)
19 RxE0- Negative LVDS differential data, CH0 (Even data)
20 RxE0+ Positive LVDS differential data, CH0 (Even data)
21 RxE1- Negative LVDS differential data, CH1 (Even data)
22 RxE1+ Positive LVDS differential data, CH1 (Even data)
23 RxE2- Negative LVDS differential data, CH2 (Even data)
24 RxE2+ Positive LVDS differential data, CH2 (Even data)

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25 GND Ground
26 GND Ground
27 RxEC- Negative LVDS differential clock, (Even clock)
28 RxEC+ Positive LVDS differential clock, (Even clock)
29 RxE3- Negative LVDS differential data, CH3 (Even data)
30 RxE3+ Positive LVDS differential data, CH3 (Even data)
6. OSD
The OSD board and its push buttons are shown in the following figure:
Power Menu -+ DownUpLED
There are six push buttons on the OSD board. The functions of the buttons are summarized below:
POWER Turns the LCD power on and off.
MENU Brings up the OSD menu and activate the selected item to enter the next Menu.
UP & DOWN Moves through various adjustments in each OSD Menu. Also after the selected
adjustment is activated, use Up & Down buttons to increase & decrease the
setting.
+ Hot key to active the AUTO SETUP function in the OSD Main Menu.
- Reserved for future use. For the current Version A, this button has no function.
The POWER button
When the POWER button is pushed on, the LED turns to green and the LCD screen is turned on.
Push the POWER button off turns off the LED and the video connection. If the inverter On/Off
control is connected to Pin #3 of CN8, then the inverter/backlight will be turned off.
The OSD Menu
When the MENU button on the OSD board is pressed, the Main Menu appears on the screen:

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MAIN MENU
H H
OSD
EXIT
AUTO SETUP
BRIGHTNESS
CONTRAST
COLOR TEMPERATURE
DISPLAY ADJUST
LANGUAGE
OSD DISPLAY
VGA/DVI
AUDIO
EXIT
RECALL
ANALOG : 1024 X 768
V.
: 59.8Hz
H.
:48KHz
There are 11 items to be selected on the MAIN MENU. At the lower side of the MAIN MENU, The
current video input mode (ANALOG), the resolution (1024x768), the horizontal and the vertical
sync frequencies (48KHz and 69.8Hx) are displayed.
Note - Some of the items on the Main Menu and the Sub Menus are reserved for the MG21,
Version B. Their functionality may not be implemented in the current Version A BIOS.
Making Adjustment
When the OSD MENU is turned on, the AUTO SETUP is highlighted. Push the UP & DOWM
buttons to move the selection up and down.
For example, pushing the DOWN button once will highlight the BRIGHTNESS selection. Then,
push the MENU button to activate it. The following BRIGHTNESS Sub Menu shows up on the
screen:
BRIGHTNESS
BRIGHTNESS
EXIT
RETURN
RECALL
This Sub Menu has the BRIGHTNESS adjustment highlighted. Push the MENU button again to
activate it and the following BRIGHTNESS adjustment box shows up on the screen.
BRIGHTNESS
130

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To make adjustments, use the UP or DOWN button to increase or decrease the setting. In the
meantime, the setting level is display numerically as well as by the white bar. After completing the
adjustment, push the MENU button to return to the previous BRIGHTNESS menu.
Follow the similar procedure to adjust the CONTRAST. The BRIGHTNESS and CONTRAST are
the two main adjustments needed to get a good display on the screen.
In the Main Menu, pushing the DOWN button to highlight the COLOR TEMPERTURE selection.
Push the MENU button to activate it. The following COLOR TEMPERATURE Sub Menu shows
up on the screen .In the present Version A BIOS, the color temperature sets 9300K, 7500K, 6500K
have been de-activated as the current code does not reproduce the color temperature selected (for
example, 9300K ) with the acceptable accuracy.
COLOR TEMPERATURE
9300K
7500K
6500K
RED
AUTO GAIN
GREEN
BLUE
RETURN
93
75
65
R
B
G
EXIT
If it is necessary to adjust the color tone, please use the RED, GREEN, and BLUE adjustments. Use
the UP & DOWN button to highlight the selected color to be adjusted and push the MENU button to
activate it. Then use the UP & DOWN buttons to adjust the setting in a similar way as illustrated in
the BRIGHTNESS adjustment.
Back to the Main Menu, push the DOWN button to highlight the OSD DISPLAY. Then push the
MENU button to activate the following OSD DISPLAY Sub Menu:
OSD DISPLAY
OSD H-POS
OSD V-POS
OSD TIMER
OSD TRANSPARENCY
RETURN
EXIT RECALL
The OSD H-POS and the OSD V-POS allow the user to position the OSD menus at the desirable
horizontal and vertical locations on the screen. The next item, the OSD TIMER sets the time period
in seconds that the OSD menus and adjustments will stay on the screen before automatically
disappear. Setting the time too short is very inconvenient in performing various adjustments.
So, from the OSD DISPLAY Menu, push the DOWN button twice to highlight the OSD TIMER and
then push the MENU button to activate the following adjustment box.

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OSD TIMER
30
The number displayed on the right side of the white bar is the time period in seconds that the OSD
Menus will stay on the screen. Use the UP and DOWN buttons to increase or decrease the time
period as needed to complete various adjustments.
The item RECALL appears in the MAIN MENU and in the Sub Menus of BRIGHTNESS,
CONTRAST, DISPLAY ADJUSTMENT, and OSD DISPLAY. The function of the RECALL is to
reset various adjustments to a pre-defined (default) setting or settings.
Note – in the present Version A BIOS, the pre-defined or default settings activated by the
RECALL may not provide the best image quality on the screen.
7. Resolution Scaling
Upscale
When the resolution setting of the video source is lower than the native resolution of the LCD, the
input video image will be upscaled to fill the entire screen (or near the entire screen). The MG21
performs the upscale function well.
Downscale
When the resolution setting of the video input is higher than the native resolution of the LCD, the
MG21 will down scale the image to the native resolution of the LCD. For example, if the LCD
resolution is XGA (1024 x 768) and if the video input resolution is set at SXGA (1280 x 1024),
the MG21 will down scale the 1280 x 1024 image to 1024 x 768 and display it to fill the entire
area of the screen. However, since the aspect ratio of SXGA resolution is 5:4 (that is, 1280 :
1024), and the LCD screen aspect ratio is 4:3 (1024 : 768), there will be a little bit image
distortion. For example, a square object in the image will be stretched in the horizontal direction
by about 6.4% and becomes slightly rectangular.
8. Disclaimer
Landmark Technology Inc. reserves the right to make changes to this document and the product
which it describes without notice. In addition, Landmark Technology Inc. shall not be liable for
technical or editorial errors or omissions made herein; nor for incidental or consequential damages
resulting from the furnishing, performance, and use of this product.
This product shall not be used for or in connection with equipment that requires an extremely high
level of reliability, such as military and aerospace applications, telecommunication equipment,
nuclear power control equipment and medical or other life support equipment. Landmark
Technology Inc. takes no responsibility for damage caused by improper use of this product which
does not meet the conditions for use specified in this user’s guide.