Seco SBC-A62-J User Manual page 24

3.3.3 Optional HDMI connector
In addition to LVDS interface, NXP i.MX6 processor also has an embedded HDMI Tx module, which provides a HDMI standard interface for HDMI1.4a compliant
displays. By using HDMI interface along with two LVDS single channel interfaces, it is possible to drive up to 3 independent displays.
Optional HDMI Connector - CN8
Pin Signal Pin
1 TMDS_LANE2+
3 TMDS_LANE2-
5 GND
7 TMDS_LANE0+
9 TMDS_LANE0-
11 GND
13 CEC
15 SCL
17 GND
19 HPD
HPD: Hot Plug Detect Input signal. +5V
+5V is derived from +5V_SB power rail.
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.
SBC-A62-J
SBC-A62-J User Manual - Rev. First Edition: 1.0 - Last Edition: 2.3 - Author: S.B. - Reviewed by N.P. Copyright © 2016 SECO S.r.l.
Signal
2 GND
4 TMDS_LANE1+
6 TMDS_LANE1-
8 GND
10 TMDS_CLK+
12 TMDS_CLK-
14 N.C.
16 SDA
18 +5V
HDMI
with 20kΩ pull-down resistor.
HDMI
For this reason, on SBC-A62-J board there is the possibility of connecting directly one HDMI
display, using a certified HDMI connector type A, model WinWin p/n WHDM-
19F3L1BN5U4.
Signals involved in HDMI management are the following:
TMDS_CLK+/TMDS_CLK-: TMDS differential Clock.
TMDS_LANE0+/TMDS_LANE0-: TMDS differential pair #0
TMDS_LANE1+/TMDS_LANE1-: TMDS differential pair #1
TMDS_LANE2+/TMDS_LANE2-: TMDS differential pair #2
SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
pull-up resistor.
SCL: DDC Clock line for HDMI panel. Output signal, electrical level +5V
up resistor.
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level
3P3V with 27kΩ pull-up resistor.
with a 2k7Ω
HDMI
with a 2k7Ω pull-
HDMI
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