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.
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LV/LVDS1_TX0-: LVDS Channel #1 differential data pair #0.
LV/LVDS1_TX1-: LVDS Channel #1 differential data pair #1.
LV/LVDS1_TX2-: LVDS Channel #1 differential data pair #2.
LV/LVDS1_TX3-: LVDS Channel #1 differential data pair #3.
LV/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.
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:
T/TMDS_CLK-: TMDS differential Clock.
TMD/TMDS_LANE0-: TMDS differential pair #0
TMD/TMDS_LANE1-: TMDS differential pair #1
TMD/TMDS_LANE2-: TMDS differential pair #2
SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
HDMI
with a 2k7
Ω
pull-up resistor.
SCL: DDC Clock line for HDMI panel. Output signal, electrical level +5V
HDMI
with a
2k7
Ω
pull-up resistor.
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level
+5V
HDMI
with 2k7
Ω
pull-up resistor.
HPD: Hot Plug Detect Input signal. +5V
HDMI
with 20k
Ω
pull-down resistor.
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 Connector - CN3
Pin Signal
Pin Signal
1
TMD
2
GND
3
TMDS_LANE2-
4
TMD
5
GND
6
TMDS_LANE1-
7
TMD
8
GND
9
TMDS_LANE0-
10
T
11
GND
12
TMDS_CLK-
13
CEC
14
N.C.
15
SCL
16
SDA
17
GND
18
+5V
HDMI
19
HPD
