Embedian, Inc.
158
SMARC-iMX8MM Computer on Module User’s Manual
v. 1.2
4.4
Power
States
The
SMARC
‐
iMX8MM
module
supports
different
power
states.
The
table
below
describes
the
behavior
in
the
different
states
and
which
power
rails
and
peripherals
are
active.
Additional
power
states
can
be
implemented
if
required
using
available
GPIOs
to
control
additional
power
domains
and
peripherals.
Abbr.
Name
Description
Module
Carrier
Board
UPG
Unplugged
No
power
is
applied
to
the
system,
except
the
RTC
battery
might
be
available
No
main
VDD_IN
applied
from
fixed
DC
supply,
VDD_IN
available
if
backup
battery
is
implemented
No
power
supply
input,
RTC
battery
maybe
inserted
OFF
off
System
is
off,
but
the
carrier
board
input
supply
is
available
The
main
VDD_IN
is
available,
but
the
CPU
and
peripherals
are
not
running.
Only
the
PMIC
is
running
Carrier
board
provides
power
for
module,
the
peripheral
supplies
are
not
available
SUS
Suspend
System
is
suspended
and
waits
for
wakeup
sources
to
trigger
CPU
is
suspended,
wakeup
capable
peripherals
are
running
while
others
might
be
switched
off
Power
rails
are
available
on
carrier
board,
peripherals
might
be
stopped
by
software
RUN
Running
System
is
running
All
power
rails
are
available,
CPU
and
peripherals
are
running
All
power
rails
are
available,
peripherals
are
running
RST
Reset
System
is
put
in
reset
state
by
holding
RESET_IN#
is
low
All
power
rails
are
available,
CPU
and
peripherals
are
in
reset
state
All
power
rails
are
available,
peripherals
are
in
reset
state
The
figure
below
shows
a
sequence
diagram
for
the
different
power
states.
The
module
automatically
enters
into
the
running
mode
when
the
main
power
rail
is
applied
to
the
module.
In
the
running
mode,
the
system
can
be
set
to