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C o n n e c t o r
P i n
A s s i g n m e n t
D S U B
P i n
S i g n a l
P i n
1
R e d - V i d e o
6
2
G r e e n - V i d e o
7
3
B l u e - V i d e o
8
N C
4
9
5
D D C - G N D
1 0
C o n n e c to r P in D e s c r ip tio n
D -S U B P in D e s c riptio n
P in
N a m e
1
R e d - V id e o
R e d vid e o signa l inp ut.
2
G re e n- V id e o
G re e n vid e o signa l inp ut.
3
B lue - V id e o
B lue vid e o signa l inp ut.
4
G N D
G ro und
5
D D C - G N D
D D C gro und fo r the V E S A D D C 2 B i func tio n.
6
R e d - G N D
A na lo g signa l gro und fo r the R e d vid e o .
7
G re e n- G N D
A na lo g signa l gro und fo r the G re e n vid e o .
8
B lue - G N D
A na lo g signa l gro und fo r the B lue vid e o .
9
+ 5 V
+ 5 V inp ut fro m ho st syste m fo r the V E S A D D C 2 B i func tio n.
1 0
S ync - G N D
S igna l gro und
1 1
G N D
G ro und
1 2
D D C _ S D A
S D A signa l inp ut fo r the V E S A D D C B 2 i func tio n.
1 3
H - S Y N C
H o rizo nta l signa l inp ut fro m the ho st syste m .
1 4
V - S Y N C
V e rtic a l signa l inp ut fro m the ho st syste m .
1 5
D D C - S C L
S C L signa l inp ut fo r the V E S A D D C 2 B i func tio n.
DVI-I / DVI-D (If using DVI-D cable, C1, C2, C3, C4, C5 is NC)
Pin
Signal
Pin
1
RX2-
11
2
RX2+
12
GND
3
13
NC
4
14
NC
5
15
SCL
6
16
7
SCA
17
8
Analog V-Sync (NC)
18
9
RX1-
19
10
RX1+
20
DVI-I / DVI-D ConnectorPinDescription
Pin
Name
Description
1 RX2-
TMDS link #0 channel#2 differentialpair
2 RX2+
TMDS link #0 channel#2 differentialpair
3 GND
GNDfor no link share
4 NC
NC
5 NC
NC
6 SCL
Clock line for DDC interface
7 SDA
Data line for DDC interface
Analog
8
V-sync for analoginterface
V-Sync
9 RX1-
TMDS link #0 channel#1 differentialpair
10 RX1+
TMDS link #0 channel#1 differentialpair
11 GND
GNDfor no link share
12 NC
NC
13 NC
NC
14 5V
+5Vinput fromhost systemfor DDC2Bfunction.
15 GND
Ground(Usingas Detect Cable)
1.3.2 Video Input Signals
V i d e o
N o .
S y m b o l
I t e m
1
F h
S c a n n i n g
H o r i z o n t a l
F r e q u e n c y
2
F v
S c a n n i n g
V e r t i c a l
F r e q u e n c y
3
V i h
H i L e v e l I n p u t
4
V i l
L o w
L e v e l
I n p u t
5
V i d e o
R G B
A n a l o g
V i d e o
L e v e l
N o t e
1 )
S c h m i t t - T r i g g e r s
I n p u t , S u p p o r t e d
1. Product Specification (continued)
S i g n a l
P i n
S i g n a l
R e d - G N D
1 1
N C
G r e e n - G N D
1 2
D D C - S D A
B l u e - G N D
1 3
H - S Y N C
+ 5 V
V - S Y N C
1 4
S y n c - G N D
1 5
D D C - S C L
D e s c riptio n
Signal
Pin
Signal
GND
21
NC
NC
22
GND
NC
RXC+
23
5V
RXC-
24
GND
Analog Red (NC)
C1
HP
Analog Green (NC)
C2
RX0-
C3
Analog Blue (NC)
RX0+
C4
Analog H-Sync (NC)
GND
C5
GND
NC
Pin
Name
Description
16 HP
Hot plugging
17 RX0-
TMDS link #0 channel#0 differentialpair
18 RX0+
TMDS link #0 channel#0 differentialpair
19 GND
GNDfor no link share
20 NC
NC
21 NC
NC
22 GND
Clock shield
23 RXC+
TMDS clock differentialpair
24 RXC-
TMDS clock differentialpair
Analog
C1
AnalogRed signal
Red
Analog
C2
AnalogGreensignal
Green
Analog
C3
AnalogBlue signal
Blue
Analog
C4
H-sync for analoginterface
H-Sync
Analog
C5
AnalogGND
GND
I n p u t
S i g n a l
M
i n
N o r m a l
M
a x
U n i t
R e m a r k
3 0
9 4
k H z
M
i n i m u m
5 5
7 6
H z
M
i n i m u m
2
5
N o t e
0
0 . 8
V
N o t e
0 . 0
0 . 7
1 . 0
V
7 5 Ω
3 . 3 V
d e v i c e
H ( & V )
s y n c
o u t p u t f r o m
P C .
1.3.2.1 Video Signal Amplitudes
The three video inputs consist of Red ,Green , and Blue
signals, each with its own coaxial cable terminated at the
monitor. These video signals are analog levels, where 0
V corresponds to black , and 700 mV is the maximum
signal amplitude for the respective color, when each
signal is terminated by a nominal 75.0 ohms .For a given
monitor luminance levels are measured using this
defined video amplitud driving a monitor meeting the
termination requirements .The signal amplitude is not to
be readjusted to compensate for variations in termination
impedance.
1.3.2.2 Video Signal Termination Impedance
This analog video signal termination shall be 75
which shall be resistive with a negligible reactive
component
1.3.2.3 Synchronization ( Sync ) Signals
The Horizontal Sync (HS) TTL signal is used to initiate
the display of a horizontal line. HS may be either active
high or active low, depending upon the timing .The
Vertical Sync (VS) TTL signal is used to initiate the
display of a new frame .VS may be either active high or
active low, depending on the timing
1.3.2.4 Sync Signal Levels
The monitor must accept sync signals from both 3.3 and
5 volt TTL logic families.The inputs shall sense a logic 0
when the input is 0.8 volt or less and shall sense a logic
1 when the input is 2.0 volts or greater. In addition to
these level requirements, there shall also be a minimum
of 0.3 volt hysteresis provided for noise immunity
(typically by using a Schmitt Trigger input ).That is , the
input level at which the monitor actually detects a logic 0
shall be at least 0.3 volt lower than the level at which it
actually detects a logic 1.If the monitor sync processing
circuits are designed around the 3.3 volt logic family
,then the sync inputs must be 5 volt tolerant .
1.3.2.5 Sync Signal Loading
TTL input loading shall be equivalent to one TTL input
load. When logic 0 is asserted by a sync input , the
maximum current source from any single monitor sync
input to the driver is 1.6 mA .When logic 1 is asserted ,
the maximum current source from the driver to any
single monitor sync input is 400 uA .
r a n g e
r a n g e
1 )
1 )
t o
G r o u n d
ACER G24
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.
3
Ω+/-
1%
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