Embedian, Inc.
91
SMARC-iMX8MM Computer on Module User’s Manual
v. 1.2
2.2
SMARC
‐
iMX8MM
Debug
2.2.1.
Serial
Port
Debug
SMARC
module
has
4
serial
output
ports,
SER0,
SER1,
SER2
and
SER3
.
Out
of
these
4
serial
ports,
SER3
is
set
as
the
serial
debug
port
use
for
i.MX8M
Mini
from
Embedian.
Users
can
change
to
any
port
they
want
to
from
u
‐
boot
defconfig
file.
SER3
is
exposed
(along
with
all
other
serial
ports
available
on
the
module)
in
the
SMARC
‐
iMX8MM
Evaluation
Carrier.
The
default
baud
rate
setting
is
115,200
8N1
.
SER3
pin
out
of
the
SMARC
‐
iMX8MM
is
shown
below:
NXP
i.MX8M
Mini
CPU
SMARC
‐
iMX8MM
Edge
Golden
Finger
Net
Names
Notes
mode
Pin
Name
Pin#
Pin
Name
SER3
(Debugging
Port)
ALT4
SAI3_TXC__
UART2_DCE_TX
P140
SER3_TX
SER3_TX
Asynchronous
serial
port
data
out
ALT4
SAI3_TXFS__
UART2_DCE_RX
P141
SER3_RX
SER3_RX
Asynchronous
serial
port
data
in
2.3
Mechanical
Specifications
2.3.1.
Module
Dimensions
The
SMARC
‐
iMX8MM
complies
with
SMARC
Hardware
Specification
in
an
82mm
x
50
mm
form
factor.
2.3.2.
Height
on
Top
2.9mm
maximum
(without
PCB)
complied
with
SMARC
specification
defines
as
3mm
as
the
maximum.
