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1.
DESCRIPTION OF CIRCUIT OPERATION:
8-1.
Mode Control.
8-1.1 H-Sync is inputted to pin 30 of IC601, V-Sync to pin 29 of IC601 for each mode
and pin 27, 26 of IC601 output always positive polarity sync.
8-1.2 The outputs from IC601 are as below (See table 1)
Frequency
No.
Resolution
Hf
Vf
KHz
Hz
1
31
70
720x400
2
31
60
640X480
3
35
86
1024X768
4
38
75
640X480
5
38
60
800X600
6
47
75
800X600
7
48
72
800X600
8
48
60
1024X768
9
53
85
800X600
10
56
70
1024X768
11
60
75
1024X768
12
64
60
1280x1024
13
69
85
1024x768
Range of Frequency
(CS3) (CS2) (CS1) OFF ST-BY SUS-P LED
Hf (KHz)
Vf (Hz)
28 ~32.9
68 ~ 72
"
58 ~ 62
33 ~ 35.9
84 ~ 88
36 ~ 40.9
73 ~ 77
36 ~ 40.9
58 ~ 62
41~ 51.9
73 ~ 77
"
70 ~ 74
"
58 ~ 62
52 ~ 61.9
83 ~ 87
"
68 ~ 72
"
73 ~ 77
62 ~ 70
58 ~ 62
62 ~ 70
83 ~ 87
13
OUTPUT (MCU PIN)
38
39
40
5
L
L
L
L
L
L
L
L
H
L
L
L
H
H
L
L
H
H
L
L
H
L
H
L
H
L
H
L
H
L
H
L
L
H
H
L
L
H
H
L
L
H
H
L
H
H
H
L
H
H
H
L
3
4
6
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
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