SBC-992-pITX
SBC-992-pITX User Manual - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G Copyright © 2016 SECO S.r.l.
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3.3.5
VGA Connector
In addition to LVDS/eDP and HDMI, SBC-992-pITX board also offers an additional VGA
interface.
Considering that integrated AMD HD Radeon GPUs are able to manage up to two
independent displays, it is possible this way to have many possible combinations of display,
using VGA, LVDS and HDMI connectors.
VGA connector is an FFC/FPC connector, top contacts, type HIROSE
FH12-12S-0.5SV(55), with pinout shown in the table on the left.
Connector mates with 0.5mm pitch 12-poles FFC cables.
Here following the VGA signals
’
description:
CRT_RED: G-series SOC internal DAC
’
s Red Signal video output. A 150
Ω
pull-down resistor is placed on the line.
CRT_GREEN: G-series SOC internal DAC
’
s Green Signal video output. A 150
Ω
pull-down resistor is placed on the line.
CRT_BLUE: G-series SOC internal DAC
’
s Blue Signal video output. A 150
Ω
pull-down resistor is placed on the line.
CRT_HSYNC: G-series SOC internal DAC
’
s Horizontal Synchronization output signal.
CRT_VSYNC: G-series SOC internal DAC
’
s Vertical Synchronization output signal.
CRT_DDC_CLK: internal DAC
’
s DDC Clock line for VGA displays detection. Output signal, electrical level +3.3V_S.
CRT_DDC_DATA: internal DAC
’
s DDC Clock line for VGA displays detection. Bidirectional signal, electrical level +3.3V_S
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, SBC-992-pITX board can be supplied with a dedicated VGA adapter, able to carry out the signals coming out from connector CN20 to a standard DB-
15 HD VGA connector. The adapter is also provided with necessary FFC cable, length 20cm. Please check chapter 5.2.2 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
