參數(shù)資料
型號： M37274MA-052SP
廠商： Mitsubishi Electric Corporation
英文描述： PHOTO SM DETECTOR
中文描述： 單芯片8位CMOS微機隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù)： 40/147頁
文件大?。?/td> 2042K
代理商： M37274MA-052SP
40
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274EFSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
Fig. 35. Sync Slice Register
(1) Clamping Circuit and Low-pass Filter
This filter attenuates the noise of the composite video signal input
from the CV
IN
pin. The CV
IN
pin to which composite video signal is
input requires a capacitor (0.1 μF) coupling outside. Pull down the
CV
IN
pin with a resistor of hundreds of kiloohms to 1 M . In addition,
we recommend to install externally a simple low-pass filter using a
resistor and a capacitor at the CV
IN
pin (refer to Figure 25).
(2) Sync Slice Circuit
This circuit takes out a composite sync signal from the output signal
of the low-pass filter. Figure 25 shows the structure of the sync slice
register.
b7 b6 b5 b4 b3 b2 b1 b0
0
0
0
Sync slice register (SSL) [Address 00E3
16
]
Sync Slice Register
7
0
R W
0
R W
Vertical synchronous
signal (V
sep
) generating
method selection bit
(SSL7)
0, 2
Fix these bits to “1.”
B
After reset
Functions
Name
R W
0: Method 1
1: Method 2
0
1
0
1
0
R W
1,
3 to 6
Fix these bits to “0.”
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