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CompuLab IPC2 Specifications Page 55

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CompuLab Ltd. IPC2 – Hardware Specification Page 55 of 83
Table 30 – Downstream Port HDMI Connector Signal Description
Pin #
Signal
Source Direction
Description
1
TMDS_DATA2+
Out
Data differential pair 2 - Link 1
2
TMDS_DATA2 Shield
-
3
TMDS_DATA2-
Out
4
TMDS_DATA1+
Out
Data differential pair 1 - Link 1
5
TMDS_DATA1 Shield
-
6
TMDS_DATA1-
Out
7
TMDS_DATA0+
Out
Data differential pair 0 - Link 1
8
TMDS_DATA0 Shield
-
9
TMDS_DATA0-
Out
10
TMDS_CLK+
Out
Clock differential pair - Link 1
11
TMDS_CLK Shield
-
12
TMDS_CLK-
Out
13
CEC
In/Out
Consumer Electronics Control
14
Reserved
-
15
DDC_SCL
Out
EDID Communication channel
16
DDC_SDA
In/Out
17
GND
-
Ground
18
PWR_5V
Out
Power
19
HPD
In
Hot Plug Detect
5.2.2 Digital Video Interface (DVI)
The Processor Digital Ports can be configured to drive DVI-D. DVI uses TMDS for transmitting data
from the transmitter to the receiver which is similar to the HDMI protocol but without the audio
and CEC. Refer to the HDMI section for more information on the signals and data transmission.
To drive DVI-I through the back panel the VGA DDC signals is connected along with the digital data
and clock signals from one of the Digital Ports. The digital display data signals driven natively are
AC coupled and needs level shifting to convert the AC coupled signals to the HDMI compliant
digital signals.
5.2.3 Display Port Interface (DP)
DisplayPort is a digital communication interface that utilizes differential signaling to achieve a high
bandwidth bus interface designed to support connections between PCs and monitors, projectors,
and TV displays. DisplayPort is also suitable for display connections between consumer electronics
devices such as high definition optical disc players, set top boxes, and TV displays.
A DisplayPort consists of a Main Link, Auxiliary channel, and a Hot Plug Detect signal. The Main
Link is a unidirectional, high-bandwidth, and low latency channel used for transport of
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