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14-4 Timing Chart
- This section of the service manual describes the timing that the computer industry recognizes as standard for
computer-generated video signals.
No
Name
1
IBM 640*350/70Hz
2
IBM 720*400/70Hz
3
IBM 640*480/60Hz
4
MAC 640*480/67Hz
5
VESA 640*480/72Hz
6
VESA 640*480/75Hz
7
VESA 800*600/56Hz
8
VESA 800*600/60Hz
9
VESA 800*600/72Hz
10
VESA 800*600/75Hz
11
MAC 832*624/75Hz
12
VESA 1024*768/60Hz
13
VESA 1024*768/70Hz
14
VESA 1024*768/75Hz
15
VESA 1152*864/75Hz
16
MAC 1152*870/75Hz
17
VESA 1280*1024/60Hz
VESA 1280*1024/75Hz
18
Separate Sync
Video
C
D
E
Sync
B
A
A : Line time total
C : Back porch
E : Front porch
Table 1 Timing Chart
Timing ID
640*350/70Hz
720*400/70Hz
640*480/60Hz
640*480/67Hz
640*480/72Hz
640*480/75Hz
800*600/56Hz
800*600/60Hz
800*600/72Hz
800*600/75Hz
832*624/75Hz
1024*768/60Hz
1024*768/70Hz
1024*768/75Hz
1152*864/75Hz
1152*870/75Hz
1280*1024/60Hz
1280*1024/75Hz
Video
Q
R
S
Sync
P
O
B : Horizontal sync width
D : Active time
dot_clk
h_freq
(MHz)
(kHz)
25.175
31.469
28.322
31.469
25.175
31.469
30.240
35.000
31.500
37.861
31.500
37.500
36.000
35.156
40.000
37.879
50.000
48.077
49.500
46.875
57.284
49.726
65.000
48.363
75.000
56.476
78.750
60.023
108.000
67.500
100.000
68.681
108.000
63.981
135.000
79.976
H/V Composite Sync
Sync-on-Green
O : Frame time total
Q : Back porch
S : Front porch
14 Reference Infomation
v_freq
(Hz)
70
70
60
66.7
72
75
56
60
72
75
75
60
70
75
75
75
60
75
P : Vertical sync width
R : Active time
14-5
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