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BT261 Datasheet(PDF) 33 Page - List of Unclassifed Manufacturers

Part # BT261
Description  30 MHz Pixel Clock Monolithic CMOS HSYNC Line Lock Controller
PDF  56 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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BT261 Datasheet(HTML) 33 Page - List of Unclassifed Manufacturers

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Brooktree®
27
L261_H
INTERNAL REGISTERS
Status Register
Bt261
30 MHz Pixel Clock Monolithic CMOS HSYNC Line Lock Controller
Table 3. Bt261 Suggested Register Settings
Pixel Clock Rate
NTSC(M)
12.2 MHz
dec hex
PAL (B, G, I)
14.75 MHz
dec
hex
Line Rate
63.556
µs
64.0
µs
(HCOUNT)
Number of pixels minus 1
(Noise Gate)
(HSYNC)
Negative polarity, 4.7
µs wide
(CLAMP)
One may CLAMP on burst
back porch or sync tip
(ZERO)
(Field Gate)
(VSYNC)
This gives FIELD = 0, 1 for
field one and two, respectively
Start 7
µs
Stop 61.76
µs
Start 4.7
µs
Stop 0
µs
Start 8.5
µs
Stop 9
µs
Start 8.5
µs
Stop 8.75
µs
Start 15
µs
Stop 45
µs
8
µs
779
88
758
59
0
107
113
107
110
189
566
98
30B
58
2F6
3B
0
6B
71
6B
6E
BD
236
62
943
104
917
70
0
126
134
126
130
223
668
118
3AF
68
395
46
0
7E
86
7E
82
DF
29C
76



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