Embedian, Inc.
103
SMARC-iMX8MM Computer on Module User’s Manual
v. 1.2
Note:
1.
Yamaichi
CN113
‐
314
‐
2001
is
automotive
grade.
2. The
vendor
drawings
for
the
connectors
listed
above
show
a
PCB
footprint
pattern
for
use
with
an
MXM3
graphics
card.
This
footprint,
and
the
associated
pin
numbering,
is
not
suitable
for
SMARC
use.
The
MXM3
standard
gangs
large
groups
of
pins
together
to
provide
~80W
capable
power
paths
needed
for
X86
graphics
cards.
The
SMARC
module
“ungangs”
these
pins
to
allow
more
signal
pins.
Footprint
and
pin
numbering
information
for
application
of
this
314
pin
connector
to
SMARC
is
given
in
the
sections
below.
2.3.9.
Module
Cooling
Solution—Heat
Spreader
A
standard
heat
‐
spreader
plate
for
use
with
the
SMARC
82mm
x
50mm
form
factor
is
described
below.
A
standard
heat
spreader
plate
definition
allows
the
customer
to
use
a
Module
from
multiple
vendors.
The
heat
spreader
plate
is
sized
at
82mm
x
42mm
x
3mm,
and
sits
3mm
above
the
SMARC
Module.
The
heat
spreader
plate
‘Y’
dimension
is
deliberately
set
at
42mm
and
not
50mm,
to
allow
the
plate
to
clear
the
SMARC
MXM3
connector.
The
plate
is
shown
in
the
figures
below.
