ch7009b Chrontel, ch7009b Datasheet - Page 27

• Manufacturer Part Number: ch7009b
• Description: Ch7009 Dvi / Tv Output Device
• Manufacturer: Chrontel

CHRONTEL
YCV[1:0] (bits 1-0) of register VBW control the filter used to limit the bandwidth of the luma signal in the CVBS
output signal. A table of –3dB bandwidth values is given below.
YSV[1:0] (bits 3-2) of register VBW control the filter used to limit the bandwidth of the luma signal in the S-Video
output signal. A table of –3dB bandwidth values is given below.
CBW (bit 4) of register VBW controls the filter used to limit the bandwidth of the chroma signal in the CVBS and
S-Video output signals. A table of –3dB bandwidth values is given below.
Bit 5 of register VBW controls the signal output on the CVBS signal. CVBW = ’0’ disables the chroma signal being
added to the CVBS signal, CVBW = ’1’ enables the chroma signal being added to the CVBS signal.
Bit 6 of register VBW controls whether the chroma sub-carrier free-runs, or is locked to the video signal. A ‘1’ causes the
sub-carrier to lock to the TV vertical rate, and should be used when the CIVEN bit (register 10h) is set to ‘0’. A ‘0’ causes
the sub-carrier to free-run, and should be used when the CIVEN bit is set to ‘1’.
Bit 7 of register VBW controls the vertical blanking interval defeat function. A ‘1’ in this register location forces the
flicker filter to minimum filtering during the vertical blanking interval. A ‘0’ in this location causes the flicker filter to
remain at the same setting inside and outside of the vertical blanking interval.
201-0000-035 Rev 3.31, 11/4/2004
Table 14. Video Bandwidth
Mode
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
0.620
0.775
0.529
0.648
0.831
1.060
0.703
0.870
0.738
0.930
0.624
0.773
0.892
0.620
0.775
0.930
0.648
0.740
0.793
0.729
0.833
0.892
0.724
0.886
1.030
0.774
0.945
1.100
0.859
0.942
1.030
0.804
0.919
1.030
0.767
0.862
0.965
0.709
0.466
0
CBW
0.856
1.070
0.730
0.894
1.150
1.470
0.970
1.200
1.020
1.280
0.862
1.070
1.230
0.856
1.070
1.280
0.894
1.020
1.100
1.010
1.150
1.230
0.999
1.220
1.430
1.070
1.310
1.520
1.190
1.300
1.420
1.110
1.270
1.430
1.060
1.190
1.330
0.979
0.643
1
2.300
2.880
1.960
2.410
3.080
3.950
2.610
3.230
2.740
3.460
2.320
2.870
3.310
2.300
2.880
3.460
2.410
2.750
2.950
2.710
3.090
3.310
2.690
3.290
3.840
2.880
3.510
4.100
3.190
3.500
3.830
2.990
3.410
3.840
2.850
3.200
3.580
2.630
1.730
00
2.690
3.360
2.290
2.810
3.600
4.610
3.040
3.770
3.200
4.030
2.710
3.350
3.870
2.690
3.360
4.030
2.810
3.210
3.440
3.160
3.610
3.870
3.140
3.840
4.480
3.360
4.100
4.780
3.720
4.080
4.470
3.480
3.980
4.480
3.320
3.740
4.180
3.070
2.020
01
YSV[1:0] and YCV[1:0]
3.540
4.430
3.020
3.700
4.750
6.080
4.010
4.970
4.220
5.320
3.570
4.420
5.100
3.540
4.430
5.320
3.700
4.230
4.530
4.160
4.760
5.100
4.130
5.060
5.910
4.430
5.400
6.300
4.910
5.380
5.890
4.590
5.250
5.910
4.380
4.930
5.510
4.050
2.660
10
CH7009B
10.100
10.400
5.880
7.350
5.010
6.140
7.870
6.660
8.240
7.000
8.820
5.920
7.330
8.450
5.880
7.350
8.820
6.140
7.010
7.510
6.900
7.890
8.450
6.860
8.400
9.790
7.340
8.960
8.140
8.920
9.770
7.620
8.710
9.790
7.260
8.170
9.140
6.720
4.410
11
27