<s>
The	O
ETRAX	B-Device
CRIS	I-Device
is	O
a	O
RISC	B-Architecture
ISA	B-General_Concept
and	O
series	O
of	O
CPUs	O
designed	O
and	O
manufactured	O
by	O
Axis	O
Communications	O
for	O
use	O
in	O
embedded	B-Architecture
systems	I-Architecture
since	O
1993	O
.	O
</s>
<s>
The	O
name	O
is	O
an	O
acronym	O
of	O
the	O
chip	O
's	O
features	O
:	O
Ethernet	O
,	O
Token	B-Device
Ring	I-Device
,	O
AXis	O
-	O
Code	O
Reduced	B-Architecture
Instruction	I-Architecture
Set	I-Architecture
.	O
</s>
<s>
Token	B-Device
Ring	I-Device
support	O
has	O
been	O
taken	O
out	O
from	O
the	O
latest	O
chips	O
as	O
it	O
has	O
become	O
obsolete	O
.	O
</s>
<s>
It	O
contains	O
IBM	B-Operating_System
3270	I-Operating_System
(	O
coax	O
)	O
and	O
IBM	B-Device
5250	I-Device
(	O
Twinax	O
)	O
communications	O
.	O
</s>
<s>
The	O
chip	O
has	O
a	O
microcontroller	B-Architecture
and	O
various	O
I/O	O
'	O
s	O
such	O
as	O
serial	O
and	O
parallel	O
.	O
</s>
<s>
In	O
1993	O
,	O
Axis	O
developed	O
the	O
ETRAX-1	O
Ethernet	O
Controller	O
,	O
which	O
has	O
10	O
Mbit/s	O
Ethernet	O
and	O
Token	B-Device
Ring	I-Device
controllers	O
.	O
</s>
<s>
In	O
1995	O
,	O
Axis	O
introduced	O
the	O
ETRAX-4	O
SoC	B-Architecture
which	O
contains	O
a	O
Ethernet	O
Controller	O
,	O
CPU	B-General_Concept
,	O
Memory	O
Interface	O
,	O
SCSI	B-Architecture
controller	O
,	O
and	O
parallel	O
and	O
serial	O
I/O	O
.	O
</s>
<s>
In	O
1997	O
,	O
Axis	O
introduced	O
the	O
ETRAX	O
100	O
SoC	B-Architecture
which	O
features	O
a	O
10/100	O
Mbit/s	O
Ethernet	O
Controller	O
,	O
ATA	B-Protocol
controller	O
,	O
and	O
Wide	O
SCSI	B-Architecture
controller	O
.	O
</s>
<s>
The	O
chip	O
introduced	O
on-chip	O
unified	O
instruction	O
and	O
data	O
cache	B-General_Concept
along	O
with	O
direct	B-General_Concept
memory	I-General_Concept
access	I-General_Concept
.	O
</s>
<s>
In	O
2000	O
,	O
Axis	O
Introduced	O
the	O
ETRAX	O
100LX	O
SoC	B-Architecture
which	O
features	O
a	O
MMU	B-General_Concept
,	O
USB	B-Protocol
controller	O
,	O
and	O
SDRAM	O
interface	O
.	O
</s>
<s>
The	O
CPU	B-General_Concept
is	O
capable	O
of	O
100	O
MIPS	O
.	O
</s>
<s>
The	O
chip	O
is	O
able	O
to	O
run	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
without	O
modifications	O
except	O
for	O
low-level	O
support	O
.	O
</s>
<s>
The	O
chip	O
's	O
maximum	O
TDP	B-General_Concept
is	O
0.35	O
Watts	O
.	O
</s>
<s>
As	O
of	O
Linux	B-Operating_System
kernel	I-Operating_System
4.17	O
,	O
the	O
architecture	O
has	O
been	O
dropped	O
due	O
to	O
being	O
obsolete	O
.	O
</s>
<s>
Introduced	O
in	O
2005	O
with	O
full	O
Linux	B-Operating_System
2.6	I-Operating_System
support	O
,	O
the	O
chip	O
features	O
:	O
</s>
