參數(shù)資料
型號： M37274EFSP
廠商： Mitsubishi Electric Corporation
英文描述： CONN HEADER 14POS SGL PCB 30GOLD
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)： 44/147頁
文件大?。?/td> 2042K
代理商： M37274EFSP
44
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. 39. Caption Position Register
(6) Reference Voltage Generating Circuit and
Comparator
The composite video signal clamped by the clamping circuit is input
to the reference voltage generating circuit and the comparator.
Reference voltage generating circuit
This circuit generates a reference voltage (slice voltage) by using
the amplitude of the clock run-in pulse in line specified by the data
Line
Line specified by bits 4 to 0 of CP
(Main data slice line)
Line specified by bits 7 to 3 of DSC3
(Sub-data slice line)
DSC1 : Data slice control register 1
DSC3 : Data slice control register 3
CP : Caption position register
Field
Field specified by bit 1 of DSC1
0: F2
1: F1
Field specified by bit 1 of DSC3
0: F2
1: F1
Bit 0 of DSC3
0
1
slice line specification circuit. Connect a capacitor between the
V
HOLD
pin and the V
SS
pin, and make the length of wiring as short
as possible so that a leakage current may not be generated.
Comparator
The comparator compares the voltage of the composite video signal
with the voltage (reference voltage) generated in the reference
voltage generating circuit, and converts the composite video signal
into a digital value.
b7 b6 b5 b4 b3 b2 b1 b0
Caption Position Register (CP) [Address 00E0
16
]
Caption Position Register
0
to
4
0
R W
0
R W
Specification main data
slice line (CP0 to CP4)
7
Fix this bit to “0.”
5, 6 Fix these bits to “0.”
B
After reset
Functions
Name
R W
1
0
0
0
R W
Table 4. Specifying of Field Whose Sets Reference Voltage
1
2
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相關代理商/技術參數(shù)
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