THEMIS
THEMIS User Manual - Rev. First Edition: 1.0 - Last Edition: 2.2 - Author: A.R. - Reviewed by S.R. -Copyright © 2022 SECO S.p.A.
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NXP i.MX8 family of processor also embeds an HDMI technology Rx module,
which provides acquisition of HDMI compliant sources.
For this reason, on THEMIS board there is the possibility of connecting one
HDMI source, using a certified HDMI Micro Connector (Type D), CN28, type FCI p/n 10118242-
001RLF. This is a factory option and is not available on all configurations.
Signals involved in HDMI Rx management are the following:
H/HMDI_CLK-: TMDS differential Clock.
H/ HDMI_RX0-: TMDS differential pair #0
H/ HDMI_RX1-: TMDS differential pair #1
H/ HDMI_RX2-: TMDS differential pair #2
HDMI_RX_SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
SINK
.
HDMI_RX_SCL: DDC Clock line for HDMI panel. Output signal, electrical level +5V
SINK
with a 47k
Ω
pull-up resistor.
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level
+3.3V_RUN with a 27k
Ω
pull-up resistor.
HPD: Hot Plug Detect Input signal. +3.3V_RUN electrical level signal with 1k
Ω
pull-up resistor.
+5V
SINK
: HDMI Input 5V Voltage reference.
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 Standard HDMI Cable can be used for 720p resolution, while a
High-Speed HDMI Cable is recommended for higher resolutions.
HDMI In Connector CN29
Pin Signal
Pin Signal
1
HPD
2
----
3
H
4
GND
5
HDMI_RX2-
6
H
7
GND
8
HDMI_RX1-
9
H
10
GND
11
HDMI_RX0-
12
H
13
GND
14
HDMI_CLK-
15
CEC
16
GND
17
HDMI_RX_SCL
18
HDMI_RX_SDA
19
+5V
SINK