參數(shù)資料
型號： M37281EKSP
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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)： 60/172頁
文件大?。?/td> 1319K
代理商： M37281EKSP
M37281MAH
–
XXXSP,M37281MFH
–
XXXSP,M37281MKH
–
XXXSP, M37281EKSP
Rev.1.01 2003.07.16 page 60 of 170
8.10.6 Data Slice Line Specification Circuit
(1) Specification of Data Slice Line
This circuit decides a line on which caption data is superimposed.
The line 21 (fixed), 1 appropriate line for a period of 1 field (total 2
line for a period of 1 field), and both fields (F1 and F2) are sliced
their data. The caption position register (address 00E6
16
) is used
for each setting (refer to Table 8.10.1).
The counter is reset at the falling edge of V
sep
and is incremented
by 1 every H
sep
pulse. When the counter value matched the value
specified by bits 4 to 0 of the caption position register, this H
sep
is
sliced.
The values of
“
00
16
”
to
“
1F
16
”
can be set in the caption position
register (at setting only 1 appropriate line). Figure 8.10.8 shows
the signals in the vertical blanking interval. Figure 8.10.9 shows
the structure of the caption position register.
(2) Specification of Line to Set Slice Voltage
The reference voltage for slicing (slice voltage) is generated for
the clock run-in pulse in the particular line (refer to Table 8.10.1).
The field to generate slice voltage is specified by bit 1 of data
slicer control register 1. The line to generate slice voltage 1 field is
specified by bits 6, 7 of the caption position register (refer to
Table 8.10.1).
Fig. 8.10.8 Signals in Vertical Blanking Interval
Video signal
Vertical blanking interval
Composite
video signal
Count value to be set in the caption position register (
“
0F
16
”
in this case)
H
sep
V
sep
H
sep
Magnified drawing
Clock run-in
Start bit + 16-bit data
Start bit
Window for
deteminating
clock-run-in
Composite video
signal
Line 21
1 appropriate line is set by
the caption position register
(when setting line 19)
(3) Field Determination
The field determination flag can be read out by bit 3 of data slicer
control register 2. This flag charge at the falling edge of V
sep
.
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參數(shù)描述
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M37281MKH-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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