Seco Smarc CSM-B79 User Manual page 41

3.3.5 HDMI / DP1++ connectors
HDMI Connector
Pin Signal Pin
1 HDMI_D2+_CON
3 HDMI_D2-_CON
5 GND
7 HDMI_D0+_CON
9 HDMI_D0-_CON
11 GND
13 ---
15 HDMI_DDC_CLK_CON
17 GND
19 HDMI_HPD_CON
Signals involved in HDMI management are the following:
HDMI_CLK+_CON / HDMI_CLK-_CON: SMARC
HDMI_D0+_CON / HDMI_D0-_CON: SMARC
HDMI_D1+_CON / HDMI_D1-_CON: SMARC
HDMI_D2+_CON / HDMI_D2-_CON: SMARC
HDMI_DDC_DAT_CON: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
HDMI_DDC_CLK_CON: DDC Clock line for HDMI panel. Bidirectional signal, electrical level +5V
HDMI_HPD_CON: Hot Plug Detect Input signal. Active high signal, +5V_RUN electrical level
+5V Power voltage reference for HDMI, directly derived from +5V_RUN.
:
HDMI
For ESD protection, on all data and voltage lines are placed clamping diodes for voltage transient suppression.
Always use HDMI-certified cables for the connection between the board and the HDMI display; a category 2 (High-Speed) cable is recommended for higher
resolutions, category 1 cables can be used for 720p resolution.
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.
CN79
Signal
2 GND
4 HDMI_D1+_CON
6 HDMI_D1-_CON
8 GND
10 HDMI_CLK+_CON
12 HDMI_CLK-_CON
14 ---
16 HDMI_DDC_DAT_CON
18 +5V
HDMI
®
module HDMI differential Clock.
®
module HDMI differential pair #0.
®
module HDMI differential pair #1.
®
module HDMI differential pair #2.
®
According to SMARC Rel. 2.1.1 specification, the secondary display interface from card edge
connector can be used to implement multi-purpose Digital Display Interfaces.
The secondary display interface can support native HDMI video interface. Alternatively, the
same pins can be used to support one multimode display port, that can be either used as DP
or HDMI interface. It also allows the use of DP++ to HDMI dongles.
Please notice that the effective support of this kind of displays depends only by the SMARC
module used with the CSM-B79 carrier board, it is not a feature dependent from the carrier
board itself.
The pin-out of this card edge connector is given according to SMARC
so that the carrier board is ready for the use of any SMARC
specifications. Please refer to the SMARC
panels supported and the availability of the HDMI / DP++ signals.
CSM-B79 board allows to interface to HDMI display, using the HDMI channel coming directly
®
from the SMARC module connector. This interface will be available on a standard certified
HDMI connector CN79, type A, model MOLEX p/n 2086581001, with the pinout shown in the
table on the left
with
HDMI
with
HDMI
®
Rel 2.1.1 specifications,
®
module that follows those
®
up resistor
up resistor
®
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