
Embedian, Inc.
38
SMARC-FiMX6 Computer on Module User’s Manual v.1.2
2.1.11.1 HDMI Signals
The table below shows the HDMI related signals.
Edge Golden
Finder
Signal Name
Direction
Type
Tolerance
Description
HDMI_D[0:2]+
HDMI_D[0:2]-
Output
TDMS
TMDS / HDMI data differential pairs
HDMI_CK-
Output
TDMS
HDMI differential clock output pair
HDMI_HPD
Input
CMOS
VDD_IO
HDMI Hot Plug Detect input
HDMI_CTRL_DAT
Bi-Dir
OD
CMOS
VDD_IO
I2C data line dedicated to HDMI
HDMI_CTRL_CK
Bi-Dir
OD
CMOS
VDD_IO
I2C clock line dedicated to HDMI
HDMI_CEC
Bi-Dir
CMOS
VDD_IO
HDMI Consumer Electronics Control
1 – wire peripheral control interface
HDMI displays uses 5V I2C signaling. The Module
HDMI_CTRL_DAT
and
HDMI_CTRL_CK
signals need to be level translated on the Carrier from the
Module VDD_IO level (3.3V or 1.8V). A similar consideration applies to the
HDMI_HPD
signal. There are a number of single chip devices on the market
that perform ESD protection and control signal level shifting for HDMI
interfaces. The Texas Instruments
TPD12S016
is one such device.