Embedian, Inc.
171
SMARC-iMX8M Computer on Module User’s Manual v.1.0
4.6.2. Carrier/Off‐Module Terminations
The following Carrier terminations are required, if the relevant interface is
used. If unused, the
SMARC
Module pins may be left un‐connected.
Module Signal
Group Name
Carrier Series
Termination
Carrier Parallel
Termination
Notes
GBE_MDI
Magnetics module
appropriate for
10/100/1000 GBE
transceivers
Secondary side center tap
terminations appropriate
for Gigabit Ethernet
implementations
GBE_LINK
(GBE status LED
sinks)
If used, current limiting
resistors and diodes to
pulled to a positive supply
rail
The open drain
GBE status
signals,
GBE_LINK100#,
GBE_LINK1000#
and
GBE_LINK_ACT#,
if used, need
Carrier based
current limiting
resistors and
LEDs. The LED
may be integrated
into a Carrier RJ45
jack. A resistor of
68 ohms, and a
LED with the
anode tied to
Carrier 3.3V, is
typical.
LVDS LCD
100 ohm resistive
termination across the
differential pairs at the
endpoint of the signal
path, usually on the
display assembly