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3.2 Connectors description
3.2.1 VGA Connector
VGA Connector - CN1
Pin
Signal
Pin
1
CRT_RED
2
GND
3
CRT_GREEN
4
GND
10
5
CRT_BLUE
11
6
GND
12
FFC cables.
Here following the VGA signals' description:
CRT_RED: Embedded AMD HD RADEON GPU's internal DAC's Red Signal video output. A 150Ω pull-down resistor is placed on the line.
CRT_GREEN: Embedded AMD HD RADEON GPU's internal DAC's Green Signal video output. A 150Ω pull-down resistor is placed on the line.
CRT_BLUE: Embedded AMD HD RADEON GPU's internal DAC's Blue Signal video output. A 150Ω pull-down resistor is placed on the line.
CRT_HSYNC: Embedded AMD HD RADEON GPU's internal DAC's Horizontal Synchronization output signal. A 1kΩ pull-up resistor is placed on the line.
CRT_VSYNC: Embedded AMD HD RADEON GPU's internal DAC's Vertical Synchronization output signal..
CRT_DDC_CLK: Embedded AMD HD RADEON GPU's internal DAC's DDC Clock line for VGA displays detection. Output signal, electrical level +3.3V_S, 4k53Ω
pull-up resistor.
CRT_DDC_DATA: Embedded AMD HD RADEON GPU's internal DAC's DDC Clock line for VGA displays detection. Bidirectional signal, electrical level +3.3V_S,
4k53Ω 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.
Q7-A29
Q7-A29 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
Qseven
used to place optional I/O connectors of any kind.
For this reason, on Q7-A29 board, there is an additional connector,
Signal
which carries out VGA interface coming out from AMD HD Radeon
7
CRT_HSYNC
GPUs embedded in the SOCs.
8
CRT_VSYNC
Considering that these GPUs are able to manage up to two independent displays, it is
9
+5V_S
possible this way to have many possible combinations of display, using this VGA connector,
LVDS/eDP interface and HDMI / DP interfaces available on Qseven
CRT_DDC_CLK
connector (type of interfaces available depends on the module's configuration purchased).
CRT_DDC_DATA
VGA connector is an FFC/FPC connector, top contacts, type HIROSE FH12A-12S-0.5SH(55),
GND
with pinout shown in the table on the left. This connector mates with 0.5mm pitch 12-poles
®
specifications Rel. 2.0 define an area, on the PCB, that can be
®
golden card edge
21
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