<s>
Communications	B-Device
Processor	I-Device
Module	I-Device
(	O
CPM	O
)	O
is	O
a	O
component	O
of	O
Motorola	B-Device
68000	I-Device
family	I-Device
(	O
QUICC	B-Device
)	O
or	O
Motorola/Freescale	O
Semiconductor	O
PowerPC/Power	O
ISA	O
(	O
PowerQUICC	B-General_Concept
)	O
microprocessors	O
designed	O
to	O
provide	O
features	O
related	O
to	O
imaging	O
and	O
communications	O
.	O
</s>
<s>
A	O
microprocessor	O
can	O
delegate	O
most	O
of	O
the	O
input/output	B-General_Concept
processing	I-General_Concept
(	O
for	O
example	O
sending	O
and	O
receiving	O
data	O
via	O
the	O
serial	O
interface	O
)	O
to	O
the	O
Communications	B-Device
Processor	I-Device
Module	I-Device
and	O
the	O
microprocessor	O
does	O
not	O
have	O
to	O
perform	O
those	O
functions	O
itself	O
.	O
</s>
<s>
Some	O
input/output	B-General_Concept
functions	O
require	O
quick	O
response	O
from	O
the	O
processor	O
,	O
for	O
example	O
due	O
to	O
precise	O
timing	O
requirements	O
during	O
data	O
transmission	O
.	O
</s>
<s>
The	O
CPM	O
features	O
its	O
own	O
RISC	B-Architecture
microcontroller	O
(	O
Communication	O
Processor	O
)	O
,	O
separate	O
from	O
the	O
actual	O
Central	B-General_Concept
Processing	I-General_Concept
Unit	I-General_Concept
IP	B-Architecture
core	I-Architecture
.	O
</s>
<s>
The	O
RISC	B-Architecture
microcontroller	O
communicates	O
with	O
the	O
core	O
using	O
dual-ported	B-General_Concept
RAM	I-General_Concept
,	O
special	O
command	O
,	O
configuration	O
and	O
event	O
registers	O
as	O
well	O
as	O
via	O
interrupts	B-Application
.	O
</s>
<s>
Motorola	B-Device
68302	I-Device
Integrated	O
Multiprotocol	O
Processor	O
featured	O
a	O
RISC	B-Architecture
processor	I-Architecture
controlled	O
either	O
by	O
a	O
microcode	B-Device
in	O
ROM	B-Device
or	O
by	O
downloadable	O
firmware	O
.	O
</s>
<s>
Various	O
forms	O
of	O
microcode	B-Device
were	O
shipped	O
for	O
different	O
applications	O
,	O
for	O
example	O
to	O
support	O
Signaling	O
System	O
7	O
communications	O
or	O
Centronics	B-Device
parallel	O
interface	O
.	O
</s>
<s>
Motorola	B-Device
68360	I-Device
QUICC	B-Device
was	O
the	O
first	O
design	O
to	O
feature	O
Communications	B-Device
Processor	I-Device
Module	I-Device
,	O
offering	O
microcode	B-Device
for	O
SS7	O
and	O
ISDN	B-Protocol
applications	O
.	O
</s>
<s>
It	O
was	O
possible	O
to	O
run	O
68360	O
in	O
slave	O
mode	O
and	O
to	O
use	O
only	O
CPM	O
part	O
of	O
the	O
chip	O
,	O
for	O
example	O
in	O
the	O
M68360QUADS-040	O
board	O
,	O
where	O
68040	B-Device
CPU	I-Device
(	O
master	O
)	O
is	O
coupled	O
with	O
68360	O
CPM	O
(	O
slave	O
)	O
,	O
with	O
CPU	O
of	O
68360	O
processor	O
being	O
disabled	O
.	O
</s>
<s>
CPM	O
was	O
used	O
later	O
in	O
the	O
PowerQUICC	B-General_Concept
series	O
of	O
PowerPC	B-Architecture
-	O
and	O
Power	O
ISA-based	O
processors	O
.	O
</s>
<s>
Early	O
designs	O
,	O
like	O
MPC860	O
,	O
used	O
virtually	O
the	O
same	O
CPM	O
as	O
the	O
previous	O
68360	O
QUICC	B-Device
processors	O
.	O
</s>
<s>
Medium	B-Protocol
access	I-Protocol
control	I-Protocol
(	O
MAC	O
)	O
,	O
</s>
<s>
Communication	O
interfaces	O
with	O
serial	O
communication	O
controllers	O
(	O
SCC	O
)	O
,	O
serial	O
management	O
controllers	O
(	O
SMC	O
)	O
,	O
Universal	B-Protocol
Serial	I-Protocol
Bus	I-Protocol
,	O
I²C	O
and	O
Serial	B-Architecture
Peripheral	I-Architecture
Interface	I-Architecture
Bus	I-Architecture
attachment	O
,	O
</s>
<s>
Direct	B-General_Concept
memory	I-General_Concept
access	I-General_Concept
(	O
DMA	O
)	O
circuitry	O
,	O
interrupt	B-Architecture
controller	I-Architecture
,	O
time-slot	B-Protocol
assigner	O
and	O
baud	O
rate	O
generators	O
.	O
</s>
