參數(shù)資料
型號： M37274MA-052SP
廠商： Mitsubishi Electric Corporation
英文描述： PHOTO SM DETECTOR
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)： 75/147頁
文件大?。?/td> 2042K
代理商： M37274MA-052SP
75
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
Input
Port
1
0
1
(4) Clock for OSD
As a clock for display to be used for OSD, it is possible to select one
of the following 4 types.
Main clock (8 MHz)
Data slicer clock output from the data slicer (approximately 26 MHz)
Clock from the LC oscillator supplied from the pins OSC1 and OSC2
Clock from the ceramic resonator or the quartz-crystal oscillator
from the pins OSC1 and OSC2
This OSD clock for each block can be selected by the following bits
: bit 7 of the port P3 direction register, bits 5 and 4 of the clock source
control register (addresses 0216
16
). A variety of character sizes can
be obtained by combining dot sizes with OSD clocks. When not us-
ing the pins OSC1 and OSC2 for the OSD clock I/O pins, the pins
can be used as sub-clock I/O pins or port P6.
Fig. 76. Block Diagram of OSD Selection Circuit
Table 12. Setting for P6
3
/OSC1/X
CIN
, P6
4
/OSC2/X
COUT
Function
Register
b7 of port P3 direction
register
Clock source
control register
OSD Clock
I/O Pin
0
1
0
1
1
b5
b4
Sub-clock
I/O Pin
0
0
0
“0”
“11”
“10”
“0”
“0”
32 kH
Z
Data slicer
circuit
Data slicer clock
OSC1 clock
LC
Ceramic
quartz-crystal
Oscillating mode for OSD
CS5
,
CS4
“00”
“1”
“1”
“1”
CS0
CS1
CS2 = “0”
CS3
CC mode block
OSD mode block
EXOSD mode block
Except “10”
“10”
“10”
CS2, CS1
Except “10”
Clock oscillation
circuit
Main clock
Except “10”
CS2, CS1
CS2, CS1
(Note)
Note :
To use data slicer clock, set bit 0 of data slicer control register to “1.”
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