參數(shù)資料
型號(hào): M37271MF-XXXSP
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): 32/97頁(yè)
文件大小: 1436K
代理商: M37271MF-XXXSP
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
00EB
16
) to “1.”
The reference clock can be used as a display clock for OSD function
in addition to the data slicer. The H
SYNC
signal can be used as a
count source instead of the composite sync signal. However, when
the H
SYNC
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 00EB
16
).
Fig. 26. Determination of V-pulse waveform
Composite
sync signal
A
B
0
1
1
V-pulse
(“L” pulse width is long,
“H” pulse width is short)
Bit 5 of
DSC2
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