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LVDS1_TX0+/LVDS1_TX0-: LVDS Channel #1 differential data pair #0.
LVDS1_TX1+/LVDS1_TX1-: LVDS Channel #1 differential data pair #1.
LVDS1_TX2+/LVDS1_TX2-: LVDS Channel #1 differential data pair #2.
LVDS1_TX3+/LVDS1_TX3-: LVDS Channel #1 differential data pair #3.
LVDS1_CLK+/LVDS1_CLK-: LVDS Channel #1 differential Clock.
LVDS_BLT_EN: +3.3V_S electrical level Output, Panel Backlight Enable signal. It can be used to turn On/Off the backlight's lamps of connected LVDS display.
LVDS_BLT_CTRL: this signal can be used to adjust the backlight brightness in displays supporting Pulse Width Modulated (PWM) regulations (+3.3V_S electrical
level).
3.3.2 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.
HDMI Connector - CN3
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
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-984
SBC-984 User Manual - Rev. First Edition: 1.0 - Last Edition: 4.0 - 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
For this reason, on SBC-984 board there is the possibility of connecting directly one HDMI
display, using a certified HDMI connector type A, model Hirose p/n MD60-19P.
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
with a 2k7Ω pull-up resistor.
SCL: DDC Clock line for HDMI panel. Output signal, electrical level +5V
2k7Ω pull-up resistor.
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level
+5V
with 2k7Ω pull-up resistor.
HDMI
HPD: Hot Plug Detect Input signal. +5V
For ESD protection, on all data and voltage lines are placed clamping diodes for voltage
HDMI
with 20kΩ pull-down resistor.
HDMI
HDMI
with a
24
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