<s>
VESA	B-Protocol
Plug	I-Protocol
and	I-Protocol
Display	I-Protocol
(	O
abbreviated	O
as	O
P&D	O
)	O
is	O
a	O
video	O
connector	O
that	O
carries	O
digital	O
signals	O
for	O
monitors	B-Device
,	O
such	O
as	O
flat	B-General_Concept
panel	I-General_Concept
displays	I-General_Concept
and	O
video	B-Device
projectors	I-Device
,	O
ratified	O
by	O
Video	O
Electronics	O
Standards	O
Association	O
(	O
VESA	B-Protocol
)	O
in	O
1997	O
.	O
</s>
<s>
Introduced	O
around	O
the	O
same	O
time	O
as	O
the	O
competing	O
connectors	O
for	O
the	O
Digital	B-Protocol
Visual	I-Protocol
Interface	I-Protocol
(	O
DVI	B-Protocol
,	O
1999	O
)	O
and	O
VESA	B-Protocol
's	O
own	O
Digital	B-Protocol
Flat	I-Protocol
Panel	I-Protocol
(	O
DFP	O
,	O
1999	O
)	O
,	O
it	O
was	O
marketed	O
as	O
a	O
replacement	O
for	O
the	O
VESA	B-Protocol
Enhanced	I-Protocol
Video	I-Protocol
Connector	I-Protocol
(	O
EVC	O
,	O
1994	O
)	O
.	O
</s>
<s>
Unlike	O
DVI	B-Protocol
,	O
it	O
never	O
achieved	O
widespread	O
implementation	O
.	O
</s>
<s>
The	O
P&D	O
connector	O
shares	O
the	O
30-pin	O
plus	O
quad-coax	O
layout	O
of	O
EVC	O
,	O
which	O
carries	O
digital	O
video	O
,	O
analog	O
video	O
,	O
and	O
data	O
over	O
Universal	B-Protocol
Serial	I-Protocol
Bus	I-Protocol
(	O
USB	B-Protocol
)	O
and	O
IEEE	B-Protocol
1394	I-Protocol
(	O
FireWire	B-Protocol
)	O
.	O
</s>
<s>
The	O
lower	O
quadrants	O
designate	O
IEEE	B-Protocol
1394	I-Protocol
and	O
USB	B-Protocol
support	O
.	O
</s>
<s>
All	O
P&D	O
connectors	O
are	O
required	O
to	O
carry	O
single-link	O
TMDS	B-Protocol
digital	O
video	O
signal	O
(	O
max	O
160MHz	O
)	O
,	O
and	O
support	O
VESA	B-Protocol
Display	O
Data	O
Channel	O
version	O
2	O
at	O
a	O
minimum	O
.	O
</s>
<s>
The	O
type	O
designation	O
for	O
the	O
analogue	O
video	O
signals	O
designates	O
the	O
voltage	O
values	O
of	O
the	O
signals	O
only	O
,	O
including	O
the	O
Type	O
4	O
(	O
VESA	B-Protocol
)	O
analog	O
DC	O
protocol	O
introduced	O
with	O
EVC	O
:	O
</s>
<s>
Data	O
signals	O
over	O
USB	B-Protocol
and	O
FireWire	B-Protocol
also	O
are	O
optional	O
.	O
</s>
<s>
USB	B-Protocol
version	O
is	O
not	O
specified	O
,	O
but	O
if	O
supported	O
,	O
it	O
would	O
have	O
been	O
intended	O
for	O
contemporary	O
USB	B-Protocol
standards	O
.	O
</s>
<s>
The	O
USB	B-Protocol
connector	O
is	O
intended	O
for	O
passing	O
mouse	O
movements	O
from	O
a	O
projector	O
's	O
wireless	O
remote	O
to	O
the	O
computer	O
's	O
presentation	O
software	O
and	O
for	O
firmware	O
upgrades	O
.	O
</s>
<s>
FireWire	B-Protocol
,	O
if	O
supported	O
,	O
must	O
be	O
compliant	O
to	O
IEEE	O
1394-1995	O
specification	O
.	O
</s>
<s>
Although	O
the	O
pin	O
layout	O
is	O
copied	O
from	O
VESA	B-Protocol
EVC	O
,	O
the	O
connector	O
shell	O
is	O
slightly	O
different	O
:	O
EVC	O
uses	O
a	O
trapezoid	O
shape	O
,	O
while	O
P&D	O
uses	O
a	O
D-shape	O
.	O
</s>
<s>
P&	O
D-A/D	O
is	O
compatible	O
with	O
EVC	O
devices	O
(	O
except	O
for	O
the	O
missing	O
VESA	B-Protocol
EVC	O
features	O
)	O
,	O
P&	O
D-D	O
is	O
not	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
regular	O
P&D	O
connector	O
,	O
the	O
standard	O
also	O
specifies	O
a	O
40-pin	O
microribbon	B-Protocol
connector	I-Protocol
,	O
which	O
is	O
only	O
defined	O
when	O
making	O
digital	O
video	O
connection	O
via	O
P&	O
D-D	O
.	O
</s>
<s>
The	O
P&D	O
port	O
is	O
sometimes	O
mistaken	O
as	O
an	O
alternative	O
form	O
of	O
the	O
Apple	B-Protocol
Display	I-Protocol
Connector	I-Protocol
,	O
but	O
ADC	O
carries	O
higher	O
current	O
,	O
has	O
different	O
pin	O
layout	O
,	O
and	O
does	O
not	O
support	O
FireWire	B-Protocol
.	O
</s>
