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VCC_LCD_SW: SW enabled LCD Power rail. Please check par. 3.3.23
DISPLAY_ANA_BKL: Backlight analog dimming signal, electrical level VCC_LCD_SW with a10
DISPLAY_BKL_CTRL: this signal can be used to adjust the backlight brightness in displays supporting Pulse Width Modulated (PWM) regulations (electrical level
VCC_LCD_SW with a10
-up resistor).
LVDS_PANEL_ON: LCD Panel enable signal, electrical level to VCC_LCD_SW with 10
DISPLAY_BKL_ON: Backlight enable signal, ele
HDMI connector
HDMI Connector
Pin
Signal
Pin
1
HPD
2
3
TMDS_LANE2+
4
5
TMDS_LANE2-
6
7
GND
8
9
TMDS_LANE0+
10
11
TMDS_LANE0-
12
13
GND
14
15
CEC
16
17
SCL
18
19
+5V
HDMI
+VDD_3P3V
-up resistor.
HPD: Hot Plug Detect Input signal. VDD_3P3V electrical level signal with 1M
+5V
: Power voltage reference for HDMI, directly derived from VDD_5V.
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-C20
SBC-C20 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. -Copyright © 2020 SECO S.p.A.
In addition to LVDS interface, NXP i.MX 8M processor also has an
CN19
embedded HDMI Tx module, which provides a HDMI standard
interface for HDMI1.4 / 2.0a compliant displays. This interface is
Signal
multiplexed with an eDP interface (par 3.3.7).
----
For this reason, on SBC-C20 board there is the possibility of connecting directly one HDMI
display, using a certified micro-HDMI connector (HDMI type D), type FCI p/n 10118242-001RLF.
GND
Signals involved in HDMI management are the following:
TMDS_LANE1+
TMDS_CLK+/TMDS_CLK-: TMDS differential Clock.
TMDS_LANE1-
TMDS_LANE0+/TMDS_LANE0-: TMDS differential pair #0
GND
TMDS_LANE1+/TMDS_LANE1-: TMDS differential pair #1
TMDS_CLK+
TMDS_LANE2+/TMDS_LANE2-: TMDS differential pair #2
TMDS_CLK-
SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level VDD_5V with a 1k5
up resistor.
GND
SCL: DDC Clock line for HDMI panel. Output signal, electrical level
SDA
resistor.
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level
-up resistor.
-up resistor
-up resistor
-down resistor.
-
-up
25
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