Video (Vga/Lvds) Interface - ADLINK Technology CoreModule 745 Reference Manual

Chapter 3

Video (VGA/LVDS) Interface

The CPU provides the graphics control and video signals to the traditional glass CRT monitors and LCD flat
panel displays. The video features are listed below:
VGA features:
•
Supports maximum resolutions of 1400x1050 at 60Hz or 2048x1536 at 60Hz
•
Provides 2D registers for added color, depth, resolution, and hardware acceleration
•
Provides integrated 3 x 8-bit DAC with R, G, and B signals to the monitor
LVDS features:
•
Integrated single LVDS channel supporting resolution up to 1280x800 or 1366x768
•
Supports 1 x 18 data format
•
Supports transmit clock frequency ranges from 25 MHz to 112 MHz
Table 3-10 lists the pin signals of the video (LVDS/VGA) header, which provides 30 pins, 2 rows, odd/even
pin sequence (1, 2) with 0.079" (2mm) pitch.
Table 3-10. Video Interface Pin Signals (J19)
Pin # Signal
1 +12V
2 VCC_LVDS_CONN
3 GND
4 GND
5 LA_CLK_P
6 LA_CLK_N
7 LA_DAT2_P
8 LA_DAT2_N
9 LA_DAT1_P
10 LA_DAT1_N
11 LA_DAT0_P
12 LA_DAT0_N
13 LBKLT_CTL
14 LVDD_EN
15 LDDC_CLK
16 LDDC_DATA
17 LBKLT_EN
18 NC
19 CON_DAC_SDA
20 CON_DAC_SCL
21 CON_DAC_RED
22 RED_RETURN
23 CON_DAC_GREEN
24 GREEN_RETURN
25 CON_DAC_BLUE
26 BLUE_RETURN
27 CRT_HSYNC
28
Description
+12 volts for flat panel and backlight
JP2 determines LVDS voltage (+3.3V or +5V)
Ground
Ground
LVDS Clock Positive
LVDS Clock Negative
LVDS DATA Positive Line 2
LVDS DATA Negative Line 2
LVDS DATA Positive Line 1
LVDS DATA Negative Line 1
LVDS DATA Positive Line 0
LVDS DATA Negative Line 0
Panel Backlight Control
Enable Panel Power
Display Data Channel Clock
Display Data Channel Data
Enable Backlight Inverter
Not Connected
Digital to Analog Converter DDC (Display Data Channel) - Data
Digital to Analog Converter DDC (Display Data Channel) - Clock
Digital to Analog Converter – Red Output to the CRT
VGA Ground for Red Output
Digital to Analog Converter – Green Output to the CRT
VGA Ground for Green Output
Digital to Analog Converter – Blue Output to the CRT
VGA Ground for Blue Output
Horizontal Sync – Digital Horizontal Sync Output to the CRT
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CoreModule 745