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參數(shù)資料
| 型號(hào)： | TB1239BF |
| 廠商： | Toshiba Corporation |
| 英文描述： | Bi-CMOS Integrated Circuit Silicon Monolithic |
| 中文描述： | 雙CMOS硅單片集成電路 |
| 文件頁(yè)數(shù)： | 17/26頁(yè) |
| 文件大?。?/td> | 333K |
| 代理商： | TB1239BF |
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TB1239BF
2002-02-12
17
Function Description
Video Select, Auto-SW
(1)
“AUTO-SW” (1) Manual Select
In video SW section, input signal is selected by the BUS as Figure 1 and Table 1. Mainly,
CVBS-OUT (pin 3) is used for the comb filter input, and Yvi-OUT (pin 11) is used for synchronization
(pin 2). Besides, on chroma line from video SW to main route, the peak detection is done during the
burst period. The result is responded to the Read BUS data, C ID.
Table 1 Selected Input and Pin 3/11 Output from Video SW Section
SW Mode
To Y/C Section
Output from V-SW
Bus
Data
1
2
3
4
5
6
Main Y
Main C
CVBS-Out
Yvi-Out
0000
A
A A A A
CVBS1
CVBS1
CVBS1
CVBS1
0001
B
A A A A
CVBS2
CVBS2
CVBS2
CVBS2
0010
C
A A A A
CVBS3
CVBS3
CVBS3
CVBS3
0100
A A B B A A
Y1
C1
Y1 C1
Y1
0101
B B B B A A
Y2
C2
Y2 C2
Y2
0110
C C B B A A
Y3
C3
Y3 C3
Y3
1000
A
A
B B
COMB Y
COMB C
CVBS1
COMB Y
1001
B
A
B B
COMB Y
COMB C
CVBS2
COMB Y
1010
C
A
B B
COMB Y
COMB C
CVBS3
COMB Y
others
Don’t use.
Figure 1 Signal Route at Video SW Section
CVBS1/Y1-IN
CVBS2/Y2-IN
CVBS3/Y3-IN
A
B
C
SW1
A
B
C
SW2
C1-IN
C2-IN
C3-IN
A
B
MIX
C
Y
SW4
A
B
A
B
A
B
SW6
SW5
(from comb filter) COMB Y-IN
(from comb filter) COMB C-IN
CVBS-OUT (to comb filter)
Yvi-OUT (to SYNC-IN)
Main Y (to Y section)
Chroma ID
Main C (to C section)
VIDEO-SW SECTION
SW3
0 dB
0 dB
6 dB
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