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.
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3.3.6
HDMI Connector
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:
H/HDMI_CLK-: HDMI differential Clock.
H/HDMI_TX0-: HDMI differential pair #0
H/HDMI_TX2-: HDMI differential pair #0
H/HDMI_TX3-: HDMI differential pair #0
SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
HDMI
with a 1k8
pull-up resistor
SCL: DDC Clock line for HDMI panel. Bidirectional signal, electrical level +5V
HDMI
with a 1k8
pull-up resistor
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level +3.3V_ALW with a 27k pull-up resistor
HPD: Hot Plug Detect Input signal
-down resistor
+5V
HDMI
: Power voltage reference for HDMI, directly derived from +5V_RUN
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 CN11
Pin Signal
Pin Signal
1
H
2
GND
3
HDMI_TX2-
4
H
5
GND
6
HDMI_TX1-
7
H
8
GND
9
HDMI_TX0-
10
H
11
GND
12
HDMI_CLK-
13
CEC
14
---
15
SCL
16
SDA
17
GND
18
+5V
HDMI
19
HPD
