SBC-C43
SBC-C43 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by S.R. -Copyright © 2020 SECO S.p.A.
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NXP i.MX 8 family of processor also embeds an HDMI Rx module.
The same type of connector as CN28 is also used for HDMI Rx module, which supports HDCP2.0
and HDMI 1.4 external sources. HDMI IN connector CN29 is not available on all configurations, it is
a factory option.
Signals involved in HDMI Rx management are the following:
H/HMDI_CLK-: TMDS differential Clock.
H/ HDMI_RX0-: TMDS differential pair #0
H/ HDMI_RX1-: TMDS differential pair #1
H/ HDMI_RX2-: TMDS differential pair #2
SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
SINK
with a
-up
resistor.
SCL: DDC Clock line for HDMI panel. Output signal, electrical level +5V
SINK
-up
resistor.
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level
+3
-up resistor.
-down resistor.
+5V
SINK
: HDMI Input 5V Voltage reference.
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.
HDMI In Connector CN29
Pin Signal
Pin Signal
1
HPD
2
----
3
H
4
GND
5
HDMI_RX2-
6
H
7
GND
8
HDMI_RX1-
9
H
10
GND
11
HDMI_RX0-
12
H
13
GND
14
HDMI_CLK-
15
CEC
16
GND
17
SCL
18
SDA
19
+5V
SINK