CCOMe-965
CCOMe-965 - Rev. First Edition: 1.0 - Last Edition: 3.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
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3.3.15
Digital Display Interface #3 Connector
As mentioned in the previous paragraph, COM Express specifications Rel.2.1 for Type 6 pinout define three Digital Display interfaces (DDI).
While first two Digital Display interfaces are switched on two
different connectors, third Digital Display Interface is carried out
directly on a standard DisplayPort Connector, CN32, type
WINNING p/n WDPE-20F5L1BU3 or equivalent, with the pinout
shown in the following table.
This connector can be used directly as a Multi-Mode Display Port connector, i.e. it can be
used also for HDMI/DVI devices by using passive external adapters.
DDI/DDI3_PAIR0-: DDI Interface #3 Differential Pair #0. Can be used as Display Port
differential pair #0 or TMDS (HDMI) differential pair #2.
DDI/DDI3_PAIR1-: DDI Interface #3 Differential Pair #1. Can be used as Display Port
differential pair #1 or TMDS (HDMI) differential pair #1.
DDI/DDI3_PAIR2-: DDI Interface #3 Differential Pair #2. Can be used as Display Port
differential pair #2 or TMDS (HDMI) differential pair #0.
DDI/DDI3_PAIR3-: DDI Interface #3 Differential Pair #3. Can be used as Display Port
differential pair #3 or TMDS (HDMI) Clock differential pair.
DDI3_CTRL/DDI3_CTRLDATA_AUX-: DDI Interface #3, Auxiliary channel for Display Port (differential pair) or DDC Clock and Data Line for TMDS.
DDI3_HPD: DDI Interface #3 Hot Plug Detect
DDI3_DDC_AUX_SEL: DDI Interface #3 Cable Adapter Detect signal. When this signal is detected high, then on the connector there is the TMDS interface (it
means that a DP-to-HDMI adapter is connected).
Digital Display Interface #3 connector - CN32
Pin Signal
Pin Signal
1
DDI
2
GND
3
DDI3_PAIR0-
4
DDI
5
GND
6
DDI3_PAIR1-
7
DDI
8
GND
9
DDI3_PAIR2-
10
DDI
11
GND
12
DDI3_PAIR3-
13
DDI3_DDC_AUX_SEL
14
GND
15
DDI3_CTRL
16
GND
17
DDI3_CTRLDATA_AUX-
18
DDI3_HPD
19
GND
20
+3.3V_DDI3
