Hdmi Connector - Seco SBC-C31 User Manual

3.3.6

HDMI Connector

HDMI Connector
Pin Signal Pin
1 HDMI_TX2+
3 HDMI_TX2-
5 GND
7 HDMI_TX0+
9 HDMI_TX0-
11 GND
13 CEC
15 SCL
17 GND
19 HPD
pull-up resistor
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level +3.3V_ALW with a 27k
HPD: Hot Plug Detect Input signal
+5V : Power voltage reference for HDMI, directly derived from +5V_RUN
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-C31
SBC-C31 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by D.T. - Copyright © 2021 SECO S.p.A.
CN11
Signal
2 GND
4 HDMI_TX1+
6 HDMI_TX1-
8 GND
10 HMDI_CLK+
12 HDMI_CLK-
14 ---
16 SDA
18 +5V
HDMI
-down resistor
RK3399 SoC has an embedded HDMI Tx module, which provides a HDMI standard interface
for HDMI1.4 / 2.0a compliant displays.
For this reason, on SBC-C31 board there is the possibility of directly
connecting one HDMI display, using a certified HDMI connector (HDMI
type A), CN11, type WINNING p/n WHDM-19F3L1BN5U4.
Signals involved in HDMI management are the following:
HDMI_CLK+/HDMI_CLK-: HDMI differential Clock.
HDMI_TX0+/HDMI_TX0-: HDMI differential pair #0
HDMI_TX1+/HDMI_TX2-: HDMI differential pair #0
HDMI_TX2+/HDMI_TX3-: HDMI differential pair #0
SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
pull-up resistor
SCL: DDC Clock line for HDMI panel. Bidirectional signal, electrical level +5V
HDMI
HDMI
pull-up resistor
with a 1k8
with a 1k8
30