WT8045
Synchronous Signal Discriminator and
Power Saving Detector for Green Monitor
Fv (Hz)
83.86
78
70.72
64
56.60
1024X768
640X350
(+,-)
640x400
(-,+)
800X600
640X350
(+,-)
640x400
(-,+)
640X480
(-,-)
800X600
1024X768
1280X1024
640X480
(-,-)
800X600 1024X768
0
31.5
33
35
38
48
36.2 43.5
56
52
64
60
Fh(KHz)
(58.5 for N28P2)
Figure 1: H/V Frequency Division and Video Mode
Mode
IBM
VGA
VESA
VGA
PIN
640X480
640X400
640X350
640X480
0
1
1
640X400
1
0
1
640X350
1
1
0
640X480
0
1
1
640X400
1
0
1
640X350
1
1
0
Table 4: IBM VGA/ VESA VGA Decoding Table
Weltrend Semiconductor, Inc.
2F., No. 24, Industry E. 9th Rd.
Science-Based Industrial Park
Hsin-Chu, Taiwan, R.O.C.
Tel: 886-35-780241
Fax: 886-35-770419
18