QuadMo747-x2000
QuadMo747-x2000 User Manual - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2014 SECO S.r.l.
22
3.2
Connectors description
3.2.1
VGA Connector
Qseven
®
specifications Rel. 2.0 define an area, on the PCB, that can be
used to place optional I/O connectors of any kind.
For this reason, on QuadMo747-x2000 board, there is an additional
connector, which carries out VGA interface coming out from Intel
®
HD
Graphics controller embedded in the CPU.
Considering that Intel
®
HD Graphics controller is able to manage up to two independent
displays, it is possible this way to have many possible combinations of display, using this VGA
connector, LVDS interface and HDMI / DP ++ interfaces available on Qseven
®
golden edge
connector (type of interfaces available depends on the module
’
s confirguation purchased).
VGA connector is an FFC/FPC connector, top contacts, type HIROSE FH12A-12S-0.5SH(55),
with pinout shown in the table on the left. This connector mates with 0.5mm pitch 12-poles
FFC cables.
Here following the VGA signals
’
description:
CRT_RED: Intel
®
HD Graphics controller internal DAC
’
s Red Signal video output. A 150
Ω
pull-down resistor is placed on the line.
CRT_GREEN: Intel
®
HD Graphics controller internal DAC
’
s Green Signal video output. A 150
Ω
pull-down resistor is placed on the line.
CRT_BLUE: Intel
®
HD Graphics controller internal DAC
’
s Blue Signal video output. A 150
Ω
pull-down resistor is placed on the line.
CRT_HSYNC: Intel
®
HD Graphics controller internal DAC
’
s Horizontal Synchronization output signal.
CRT_VSYNC: Intel
®
HD Graphics controller internal DAC
’
s Vertical Synchronization output signal.
CRT_DDC_CLK: Intel
®
HD Graphics controller internal DAC
’
s DDC Clock line for VGA displays detection. Output signal, electrical level +3.3V_S, 2k2
Ω
pull-up
resistor.
CRT_DDC_DATA: Intel
®
HD Graphics controller internal DAC
’
s DDC Clock line for VGA displays detection. Bidirectional signal, electrical level +3.3V_S, 2k2
Ω
pull-
up resistor.
Please be aware that for the connection to external VGA displays, adapter circuitry is needed; it will provide for ESD protection, voltage level shifting for DDC,
filtering for reduction of noise and EMI, and so on.
Optionally, SECO can provide a dedicated VGA adapter, able to carry out the signals coming out from connector CN1 to a standard DB-15 HD VGA connector.
The adapter is also provided with necessary FFC cable, length 20cm. Please check chapter 5.2.1 for further details.
VGA Connector - CN1
Pin Signal
Pin Signal
1
CRT_RED
7
CRT_HSYNC
2
GND
8
CRT_VSYNC
3
CRT_GREEN
9
+5V_S
4
GND
10
CRT_DDC_CLK
5
CRT_BLUE
11
CRT_DDC_DATA
6
GND
12
GND
