參數(shù)資料
型號： M37274EFSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP52
封裝： 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-52
文件頁數(shù)： 89/148頁
文件大小： 1946K
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
VHOLD pin and the VSS 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
0R 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
RW
10
0
0R W
Table 4. Specifying of Field Whose Sets Reference Voltage
1
2
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
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