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2 Product Specifications
Mode
IBM
VGA2/
70 Hz
Timing
720 x 400
fH (kHz)
31.469
A µsec
31.777
B µsec
3.813
C µsec
1.589
D µsec
26.058
E µsec
0.318
fV (Hz)
70.087
O msec
14.268
P msec
0.064
Q msec
0.858
R msec
13.155
S msec
0.191
Clock
Freq.
28.322
(MHz)
Polarity
H.Sync
Negative
V.Sync
Positive
Remark
Separate
Separate Sync
Horizontal
Video
Video
C
D
E
C
D
E
Sync
Sync
Sync
B
B
A
A
A : Line time total
C : Back porch
E : Front porch
2-4
Table 2-2 Timing Chart
VGA3/
640/75 Hz
800/60 Hz
60 Hz
640 x 480
800 x 600
640 x 480
31.469
37.500
37.879
31.778
26.667
26.400
3.813
2.032
3.200
1.589
3.810
2.200
26.058
20.317
20.000
0.318
0.508
0.000
59.940
75.000
60.317
16.683
13.333
16.579
0.064
0.080
0.106
0.794
0.427
0.607
15.761
12.800
15.840
0.064
0.027
0.0261
26.175
31.500
40.000
Negative
Negative
Positive
Negative
Negative
Positive
Separate
Separate
Separate
Vertical
Video
Video
Q
Q
R
R
S
S
Sync
Sync
Sync
P
P
P
O
O
O
B : Horizontal sync width
D : Active time
VESA
800/75 Hz
1024/60 Hz
1024/75 Hz
800 x 600
1024 x 768
1024 x 768
46.875
48.363
60.023
21.333
20.677
16.660
1.616
2.092
1.219
3.232
2.462
2.235
16.162
15.754
13.003
0.323
0.369
0.203
75.000
60.004
75.029
13.333
16.666
13.328
0.064
0.124
0.050
0.448
0.600
0.466
12.800
15.880
12.795
0.021
0.062
0.017
49.500
75.000
78.750
Positive
Negative
Positive
Positive
Negative
Positive
Separate
Separate
Separate
H/V Composite Sync
A
Horizontal
Vertical
P
B
O : Frame time total
Q : Back porch
S : Front porch
1280/60 Hz
1280/75 Hz
1280 x 1024
1280 x 1024
(Analog)
(Analog)
63.981
79.975
11.852
12.504
1.037
1.067
2.296
1.837
9.259
9.481
0.000
0.119
60.020
75.025
16.005
13.329
0.047
0.038
0.594
0.475
15.630
12.804
0.016
0.013
108.000
135.000
Positive
Positive
Positive
Positive
Separate
Separate
VIDEO
Q
S
R
O
P : Vertical sync width
R : Active time
DS17BS*
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