<s>
Super	B-Device
I/O	I-Device
is	O
a	O
class	O
of	O
I/O	O
controller	O
integrated	O
circuits	O
that	O
began	O
to	O
be	O
used	O
on	O
personal	B-Device
computer	I-Device
motherboards	B-Device
in	O
the	O
late	O
1980s	O
,	O
originally	O
as	O
add-in	O
cards	O
,	O
later	O
embedded	O
on	O
the	O
motherboards	B-Device
.	O
</s>
<s>
A	O
super	B-Device
I/O	I-Device
chip	O
combines	O
interfaces	O
for	O
a	O
variety	O
of	O
low-bandwidth	O
devices	O
.	O
</s>
<s>
The	O
functions	O
below	O
are	O
usually	O
provided	O
by	O
the	O
super	B-Device
I/O	I-Device
if	O
they	O
are	O
on	O
the	O
motherboard	B-Device
:	O
</s>
<s>
Most	O
Super	B-Device
I/O	I-Device
chips	O
include	O
some	O
additional	O
low-speed	O
devices	O
,	O
such	O
as	O
:	O
</s>
<s>
By	O
combining	O
many	O
functions	O
in	O
a	O
single	O
chip	O
,	O
the	O
number	O
of	O
parts	O
needed	O
on	O
a	O
motherboard	B-Device
is	O
reduced	O
,	O
thus	O
reducing	O
the	O
cost	O
of	O
production	O
.	O
</s>
<s>
The	O
original	O
super	B-Device
I/O	I-Device
chips	O
communicated	O
with	O
the	O
central	B-General_Concept
processing	I-General_Concept
unit	I-General_Concept
via	O
the	O
ISA	B-Architecture
bus	I-Architecture
.	O
</s>
<s>
With	O
the	O
evolution	O
away	O
from	O
ISA	B-Architecture
towards	O
use	O
of	O
the	O
PCI	B-Protocol
bus	I-Protocol
,	O
the	O
Super	B-Device
I/O	I-Device
chip	O
was	O
often	O
the	O
biggest	O
remaining	O
reason	O
for	O
continuing	O
inclusion	O
of	O
ISA	B-Architecture
on	O
the	O
motherboard	B-Device
.	O
</s>
<s>
Later	O
super	B-Device
I/O	I-Device
chips	O
use	O
the	O
LPC	O
bus	O
instead	O
of	O
ISA	B-Architecture
for	O
communication	O
with	O
the	O
central	B-General_Concept
processing	I-General_Concept
unit	I-General_Concept
.	O
</s>
<s>
This	O
normally	O
occurs	O
through	O
an	O
LPC	O
interface	O
on	O
the	O
southbridge	B-Device
chip	O
of	O
the	O
motherboard	B-Device
.	O
</s>
<s>
Since	O
Intel	O
is	O
replacing	O
the	O
LPC	O
bus	O
with	O
the	O
eSPI	O
bus	O
,	O
super	B-Device
I/O	I-Device
chips	O
that	O
connect	O
to	O
that	O
bus	O
have	O
appeared	O
on	O
the	O
market	O
.	O
</s>
<s>
Companies	O
that	O
make	O
super	B-Device
I/O	I-Device
controllers	O
include	O
Nuvoton	O
(	O
has	O
incorporated	O
Winbond	O
)	O
,	O
,	O
Fintek	O
Inc	O
.	O
,	O
ENE	O
Tech	O
.	O
</s>
<s>
National	O
Semiconductor	O
(	O
Now	O
Texas	O
Instruments	O
)	O
used	O
to	O
make	O
super	B-Device
I/O	I-Device
controllers	O
but	O
sold	O
that	O
business	O
to	O
Winbond	O
at	O
2005	O
,	O
which	O
already	O
had	O
a	O
competing	O
super	B-Device
I/O	I-Device
controller	O
business	O
.	O
</s>
<s>
SMSC	O
made	O
super	B-Device
I/O	I-Device
chips	O
and	O
then	O
got	O
acquired	O
by	O
Microchip	O
Technology	O
.	O
</s>
