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M37271MF-252SP Datasheet(PDF) 32 Page - Mitsubishi Electric Semiconductor

Part # M37271MF-252SP
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER???
PDF  97 Pages
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Manufacturer  MITSUBISHI [Mitsubishi Electric Semiconductor]
Direct Link  http://www.mitsubishichips.com
Logo MITSUBISHI - Mitsubishi Electric Semiconductor

M37271MF-252SP Datasheet(HTML) 32 Page - Mitsubishi Electric Semiconductor

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MITSUBISHI MICROCOMPUTERS
M37271MF-XXXSP
M37271EF-XXXSP, M37271EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
32
(4) Timing Signal Generating Circuit
This circuit generates a reference clock which is 832 times as large
as the horizontal synchronizing signal frequency. It also generates
various timing signals on the basis of the reference clock, horizontal
synchronizing signal and vertical synchronizing signal. The circuit
operates by setting bit 0 of data slicer control register 2 (address
00EB16) to “1.”
The reference clock can be used as a display clock for OSD function
in addition to the data slicer. The HSYNC signal can be used as a
count source instead of the composite sync signal. However, when
the HSYNC signal is selected, the data slicer cannot be used. A count
source of the reference clock can be selected by bit 1 of data slicer
control register 2 (address 00EB16).
Fig. 26. Determination of V-pulse waveform
Composite
sync signal
AB
0
1
1
V-pulse
(“L” pulse width is long,
“H” pulse width is short)
Bit 5 of
DSC2



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