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CN76 position
DP1++ Working mode
1-3
Fixed HDMI mode (DDC available)
3-4
Multimode DP (standard working)
3-5
Fixed DP mode (DP_AUX available)
3.3.6 DP0++ connector
Multimode DP#0 Connector
Pin
Signal
Pin
1
DDI0_PAIR0+
3
DDI0_PAIR0-
5
GND
7
DDI0_PAIR2+
9
DDI0_PAIR2-
11
GND
13
DDI0_DDC_AUX_SEL
15
DDI0_CTRLCLK_AUX+
17
DDI0_CTRLDATA_AUX-
19
GND
Signal Description:
DDI0_PAIR0+/DDI0_PAIR0-: SMARC
#2
DDI0_PAIR1+/DDI0_PAIR1-: SMARC
#1
DDI0_PAIR2+/DDI0_PAIR2-: SMARC
#0
DDI0_PAIR3+/DDI0_PAIR3-: SMARC
pair
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
Since CSM-B79 is a carrier board specifically designed for development purposes, onboard
there is a 4-way jumper to select normal working of HDMI/DP1++ interface or to fix this
To select standard mode working, the jumper must be set in 3-4 position.
According to SMARC
CN74
connector can be used to implement multi-purpose Digital Display Interfaces. As stated in the
specification, the third display interface can support multimode display port, that can be either used as
Signal
DP++ interface or HDMI over DP++ through external dongle. The difference with second display
2
GND
interface is that this one cannot support native HDMI, and this is the reason why there is not an high
speed multiplexer to redirect signals from card edge connector as per second display interface
4
DDI0_PAIR1+
(par.3.3.5)
6
DDI0_PAIR1-
Please notice that the effective support of this kind of displays depends only by the SMARC
8
GND
used with the CSM-B79 carrier board, it is not a feature dependent from the carrier board itself.
10
DDI0_PAIR3+
The pin-out of this card edge connector is given according to SMARC
12
DDI0_PAIR3-
that the carrier board is ready for the use of any SMARC
Please refer to the SMARC
14
DDI0_CEC
the availability of the HDMI / DP++ signals.
16
GND
The multimode Display Port interface (DP0++) from card edge connector
18
DDI0_HPD
is made available on connector CN74, type WINNING p/n WDPE-
20
DD0_PWR
20F3L1BU3 or equivalent, with the pinout shown in the left table.
®
module DDI Interface #0 Differential Pair #0. Can be used as Display Port differential pair #0 or TMDS (HDMI) differential pair
®
module DDI Interface #0 Differential Pair #1. Can be used as Display Port differential pair #1 or TMDS (HDMI) differential pair
®
module DDI Interface #0 Differential Pair #2. Can be used as Display Port differential pair #2 or TMDS (HDMI) differential pair
®
module DDI Interface #0 Differential Pair #3. Can be used as Display Port differential pair #3 or TMDS (HDMI) Clock differential
®
Rel. 2.1.1 specification, also the third display interface from card edge
®
®
®
Rel. 2.1.1 specifications, so
®
module that follows those specifications.
module
43
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