Embedian, Inc.
146
SMARC-iMX8MM Computer on Module User’s Manual
v. 1.2
Chapter
4
Power
Control
Signals
between
SMARC
‐
iMX8MM
Module
and
Carrier
SMARC
modules
are
designed
to
be
driven
with
a
single
+3V
to
+5.25V
input
power
rail.
Unlike
Q7
module,
there
is
no
separate
voltage
rail
for
standby
power,
other
than
the
very
low
current
RTC
voltage
rail.
All
module
operating
and
standby
power
comes
from
the
single
set
of
VDD_IN
pins.
This
suits
battery
power
sources
well,
and
is
also
easy
to
use
with
non
‐
battery
sources.
SMARC
module
has
specific
handshaking
rules
to
the
carrier
by
SMARC
hardware
specification.
To
design
the
carrier
board,
users
need
to
follow
these
rules
or
it
might
not
boot
up.
Some
pull
‐
up
and
pull
‐
down
also
need
to
be
cared
to
make
all
functions
work.
4.1
SMARC
‐
iMX8MM
Module
Power
4.1.1.
Input
Voltage
/
Main
Power
Rail
The
allowable
Module
DC
input
voltage
range
for
SMARC
‐
iMX8MM
is
from
3.0V
to
5.25V.
This
voltage
is
brought
in
on
the
VDD_IN
pins
and
returned
through
the
numerous
GND
pins
on
the
connector.
Ten
pins
are
allocated
to
VDD_IN
.
The
connector
pin
current
rating
is
0.5A
per
pin.
This
works
out
to
5A
total
for
the
10
pins.
At
the
lowest
allowed
Module
input
voltage,
this
would
allow
up
to
16.75W
of
electrical
power
to
be
brought
in
(with
no
de
‐
rating
on
the
connector
current
capability).
With
a
40%
connector
current
de
‐
rating,
up
to
10W
may
be
brought
in
at
3V.
SMARC
‐
iMX8MM
typically
consumes
1.5~2W
depending
on
dual
or
quad
cores
and
is
pretty
safe
in
using
the
connector.
