參數(shù)資料
型號(hào)： M37270MF-106SP
廠商： Mitsubishi Electric Corporation
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(jī)隱蔽字幕解碼器和屏幕顯示控制器
文件頁(yè)數(shù)： 32/94頁(yè)
文件大?。?/td> 1551K
代理商： M37270MF-106SP
MITSUBISHI MICROCOMPUTERS
M37270MF-XXXSP
M37270EF-XXXSP, M37270EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
32
After a falling of the clock run-in pulse set in bits 2 to 0 of clock run-
in detect register 2 (address 00E9
16
) is detected, a start bit is
detected by sampling a comparator output. A sampling clock for
sampling is obtained by dividing the reference clock generated in
the timing signal generating circuit by 13.
Figure 28 shows the structure of clock run-in detect register 2.
The contents of bits 2 to 0 of clock run-in detect register 2 and bit
1 of clock run-in register 2 are written at a falling of the horizontal
synchronizing signal. For this reason, even if an instruction for
setting is executed, the contents of the register cannot be rewritten
until a falling of the horizontal synchronizing signal.
Fig. 27. Structure of clock run-in register 2
(8) Clock run-in determination circuit
This circuit sets a window in the clock run-in portion in the composite
video signal, and then determinates clock run-in by counting the
number of pulses in this window. Set the time from a falling of the
horizontal synchronizing signal to a start of the window by bits 0 to 5
of the window register (address 00E2
16
; refer to Figure 29). The
window ends according to the contents of the setting of the start bit
position register (refer to Figure 26).
Fig. 29. Structure of window register
7
0
1
Start bit detecting method
selection bit
0 : Method 1
1 : Method 2
Clock run-in register 2
(CR2 : address 00E7
16
)
Fix this bit to “1”
Fix these bits to “100111
2
”
0 0
1
1 1
1
Fig. 28. Structure of clock run-in detect register 2
7
0 0
0
Window start time
Time from a falling of the
horizontal synchronizing signal
to a start of the window = 4
set
value (“00
16
” to “3F
16
”)
reference
clock period
Window register
(WN : address 00E2
16
)
Fix these bits to “0”
7
0
Clock run-in pulses for sampling
b2 b1 b0
0 0 0 : Not available
0 0 1 : 1st pulse
0 1 0 : 2nd pulse
0 1 1 : 3rd pulse
1 0 0 : 4th pulse
1 0 1 : 5th pulse
1 1 0 : 6th pulse
1 1 1 : 7th pulse
Clock run-in detect register 2
(CRD2 : address 00E9
16
)
Data clock generating time
Time from detection of a start bit
to occurrence of a data clock
= (13 + set value)
reference
clock period
相關(guān)PDF資料
PDF描述
M37270MF-167SP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37270MF-168SP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37271EF-XXXSP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37271MF-XXXSP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37271MF-220SP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37270MF107SP 制造商:MITS 功能描述:*
M37270MF-167SP 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37270MF-168SP 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37270MF-XXXSP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37271EF 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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