參數(shù)資料
型號: TB1311AFG
元件分類: 信號分離
英文描述: SYNC SEPARATOR IC, PQFP80
封裝: 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù): 14/46頁
文件大小: 948K
代理商: TB1311AFG
TB1311AFG
2006-05-29
21
Vertical sync separation for 1250i/50
When HV FREQ2 = 01000, the vertical sync separation for the 1250i/50 is accomplished through the use of a special
circuit. The phase of the VD-out (pin 13) depends on the H-SYNC timing shown in the figure below. There is no VD-out
when there is no H-SYNC input.
In the manual sync processing mode (A-SYNC = OFF), use READ BUS functions, V-SYNC-W and H, V FORMAT (or H,
V FREQ DET) to detect the 1250i/50.
Note: The tailing edge of the VD-OUT has a jitter. Use the leading edge only.
HD width
HD-OUT width is selectable by HD WIDTH as below. A setting in which HD WIDTH = 1 (NARROW) is recommended
for the 1125/50p/60p format owing to crosstalk from HD-OUT to video signals causing spike noise on video signals.
SYNC-IN
(Y-IN)
HD-OUT
(HD WIDTH = 1)
HD-OUT
(HD WIDTH =0 )
1.7 s (typ.)
0.7 s (typ.)
1125/60p signal
HD/VD input amplitude
When a 5.6 k
is added before the input pin like the following figure, 5.0 Vp-p pulse input is allowed. However, the
acceptable minimum amplitude then becomes 2.0 Vp-p.
Normal application
For large-input application
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