Embedian, Inc.
152
SMARC-iMX8MM Computer on Module User’s Manual
v. 1.2
4.2.2.
Power
Control
Signals
The
input
pins
listed
in
the
following
table
are
all
active
low
and
are
meant
to
be
driven
by
OD
(open
drain)
devices
on
the
Carrier.
The
Carrier
either
floats
the
line
or
drives
it
to
GND
.
No
Carrier
pull
‐
ups
are
needed.
The
pull
‐
up
functions
are
performed
on
the
Module.
The
voltage
rail
that
these
lines
are
pulled
to
on
the
Module
varies,
depending
on
the
design,
and
may
be
3.3V
or
VDD_IN
.
SMARC
Edge
Finger
I/O
Type
Power
Rail
Description
Pin#
Pin
Name
S150
VIN_PWR_BAD#
I
CMOS
VDD_IN
Power
bad
indication
from
Carrier
board
S154
CARRIER_PWR_O
N
O
CMOS
VDD_IO
Signal
to
inform
Carrier
board
circuits
being
powered
up
P126
RESET_OUT#
O
CMOS
VDD_IO
General
purpose
reset
output
to
Carrier
board.
P127
RESET_IN#
I
CMOS
VDD_IO
Reset
input
from
Carrier
board.
Carrier
drives
low
to
force
a
Module
reset,
floats
the
line
otherwise.
Pulled
up
on
Module.
Driven
by
OD
part
on
Carrier.
P128
POWER_BTN#
I
CMOS
VDD_IO
Power
‐
button
input
from
Carrier
board.
Carrier
to
float
the
line
in
in
‐
active
state.
Active
low,
level
sensitive.
It
is
de
‐
bounced
on
the
Module
Pulled
up
on
Module.
Driven
by
OD
part
on
Carrier.
