參數(shù)資料
型號: TB1274BFG
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝: 10 X 14 MM, 0.80 MM PITCH, QFP-48
文件頁數(shù): 8/37頁
文件大?。?/td> 839K
代理商: TB1274BFG
TB1274BFG
2005-08-18
16
FUNCTION DESCRIPTION
VIDEO SELECT,
AUTO-SW
1) “AUTO-SW” = (1) Manual select
When “AUTO-SW” is (1) Manual select, input signal is selected by the BUS as Fig. 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.
CVBS1/Y1-IN
Main Y (to Y section)
Main C (to C section)
CVBS2/Y2-IN
CVBS3/Y3-IN
A
B
MIX
C1-IN
C2-IN
C3-IN
6dB
0dB
(from Comb filter) COMB Y-IN
(from Comb filter) COMB C-IN
CVBS-OUT (to Comb filter)
Yvi-OUT (to SYNC-IN)
Chroma ID
VIDEO-SW SECTION
SW1
SW3
SW2
SW4
SW5
SW6
Y
C
A
B
C
A
B
C
A
B
A
B
A
Fig. 1 Signal route at Video SW section
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
CVBS1
0001
B
A
CVBS2
0010
C
A
CVBS3
0100
A
B
A
Y1
C1
Y1+C1
Y1
0101
B
A
Y2
C2
Y2+C2
Y2
0110
C
B
A
Y3
C3
Y3+C3
Y3
1000
A
B
COMB Y
COMB C
CVBS1
COMB Y
1001
B
A
B
COMB Y
COMB C
CVBS2
COMB Y
1010
C
A
B
COMB Y
COMB C
CVBS3
COMB Y
others
Don’t use.
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