<s>
COM	B-Device
Express	I-Device
,	O
a	O
computer-on-module	B-Application
(	O
COM	O
)	O
form	O
factor	O
,	O
is	O
a	O
highly	O
integrated	O
and	O
compact	O
computer	O
that	O
can	O
be	O
used	O
in	O
a	O
design	O
application	O
much	O
like	O
an	O
integrated	O
circuit	O
component	O
.	O
</s>
<s>
Each	O
module	O
integrates	O
core	O
CPU	B-Device
and	O
memory	O
functionality	O
,	O
the	O
common	O
I/O	O
of	O
a	O
PC/AT	O
,	O
USB	B-Protocol
,	O
audio	O
,	O
graphics	O
(	O
PEG	O
)	O
,	O
and	O
Ethernet	O
.	O
</s>
<s>
COM	B-Device
Express	I-Device
employs	O
a	O
mezzanine-based	O
approach	O
.	O
</s>
<s>
Over	O
time	O
,	O
the	O
COM	B-Device
Express	I-Device
mezzanine	O
modules	O
can	O
be	O
upgraded	O
to	O
newer	O
,	O
backwards-compatible	O
versions	O
.	O
</s>
<s>
COM	B-Device
Express	I-Device
is	O
commonly	O
used	O
in	O
Industrial	O
,	O
military	O
,	O
aerospace	O
,	O
gaming	O
,	O
medical	O
,	O
transportation	O
,	O
Internet	B-Operating_System
of	I-Operating_System
things	I-Operating_System
,	O
and	O
general	O
computing	O
embedded	O
applications	O
.	O
</s>
<s>
The	O
COM	B-Device
Express	I-Device
standard	O
was	O
first	O
released	O
in	O
2005	O
by	O
the	O
PCI	O
Industrial	O
Computer	O
Manufacturers	O
Group	O
(	O
PICMG	O
)	O
.	O
</s>
<s>
COM	B-Device
Express	I-Device
is	O
used	O
in	O
railway	O
,	O
industrial	O
,	O
and	O
military	O
applications	O
.	O
</s>
<s>
There	O
are	O
also	O
efforts	O
for	O
a	O
Rugged	O
COM	B-Device
Express	I-Device
specification	O
through	O
VITA	O
.	O
</s>
<s>
The	O
latest	O
pin-out	O
added	O
in	O
revision	O
3.0	O
of	O
the	O
COM	B-Device
Express	I-Device
specification	O
(	O
available	O
from	O
www.picmg.org	O
)	O
is	O
Type	O
7	O
.	O
</s>
<s>
The	O
Type	O
7	O
provides	O
up	O
to	O
four	O
10	O
GbE	O
interfaces	O
and	O
up	O
to	O
32	O
PCIe	O
lanes	O
,	O
making	O
COM	B-Device
Express	I-Device
3.0	O
appropriate	O
for	O
data	O
center	O
,	O
server	O
,	O
and	O
high-bandwidth	O
video	O
applications	O
.	O
</s>
<s>
COM	B-Device
Express	I-Device
Rev	O
3.0	O
removed	O
legacy	O
Type	O
1	O
,	O
Type	O
2	O
,	O
Type	O
3	O
,	O
Type	O
4	O
,	O
and	O
Type	O
5	O
,	O
recommending	O
that	O
new	O
designs	O
should	O
use	O
Type	O
6	O
,	O
7	O
or	O
10	O
.	O
</s>
<s>
The	O
COM	B-Device
Express	I-Device
specification	O
is	O
hosted	O
by	O
PICMG	O
.	O
</s>
<s>
However	O
,	O
the	O
COM	B-Device
Express	I-Device
Design	O
Guide	O
is	O
free	O
to	O
download	O
.	O
</s>
<s>
COM	B-Device
Express	I-Device
also	O
specifies	O
an	O
API	O
to	O
control	O
embedded	O
functionalities	O
like	O
watchdog	O
timer	O
or	O
I2C	O
.	O
</s>
