Embedian, Inc.
40
SMARC-iMX8MM Computer on Module User’s Manual
v. 1.2
2.1.8.
Gigabit
Ethernet
Controller
(10/100/1000Mbps)
Interface
The
SMARC
‐
iMX8MM
module
supports
one
Gigabit
Ethernet
(
10/100/1000
Mbps)
interfaces.
The
Gigabit
Ethernet
controller
interfaces
are
accomplished
by
using
the
low
‐
power
Qualcomm
Atheros
AR8035
physical
layer
(PHY)
transceiver
with
variable
I/O
voltage
that
is
compliant
with
the
IEEE
802.3
‐
2005
standards.
The
AR8035
supports
communication
with
an
Ethernet
MAC
via
a
standard
RGMII
interface.
The
Ethernet
interface
consists
of
4
pairs
of
low
voltage
differential
pair
signals
designated
from
GBE0_MDI0±
to
GBE0_MDI3±
plus
control
signals
for
link
activity
indicators.
These
signals
can
be
used
to
connect
to
a
10/100/1000
BaseT
RJ45
connector
with
integrated
or
external
isolation
magnetics
on
the
carrier
board.
