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參數資料
| 型號： | M37271EF-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微機隱蔽字幕解碼器和屏幕顯示控制器 |
| 文件頁數： | 55/97頁 |
| 文件大小： | 1436K |
| 代理商： | M37271EF-XXXSP |
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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
55
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 3 types.
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. 63. Block diagram of OSD selection circuit
Fig. 62. Structure of clock control register
Table 13. Setting for P6
3
/OSC1/X
CIN
, P6
4
/OSC2/X
COUT
Function
Register
b7 Port P3 direction
register
Clock source
control register
OSD clock
I/O pin
0
0
1
1
0
1
1
b5
b4
Sub-clock
I/O pin
0
0
0
Note :
Be sure to set bit 7 to “0” for program of the mask and the
EPROM versions. For the emulator MCU version
(M37270ERSS), be sure to set bit 7 to “1” when using the
data slicer clock for software debugging.
7
0
Clock source control register
(CS : address 0216
16
)
CC mode clock selection bit
0 : Data slicer clock
1 : OSC1 clock
OSD mode clock selection bits
b2 b1
0 0 : Data slicer clock
0 1 : OSC1 clock
1 0 :
1 1 :
Do not set
EXOSD mode clock selection bit
0 : Data slicer clock
1 : OSC1 clock
Pre-divide ratio of layer 2 selection bit
0 :
1
1 :
2
Test bit (Note)
OSD1 oscillating mode selection bits
b5 b4
0 0 : 32 kH
Z
oscillating mode
0 1 : Input ports P6
3
, P6
4
1 0 : LC oscillating mode
1 1 : Ceramic · quartz-crystal
oscillating mode
“0”
“11”
“10”
“0”
“0”
32 kH
Z
Data slicer
circuit
Data slicer clock
OSC1 clock
LC
Ceramic ·
quartz-crystal
Oscillating mode for OSD
CS
5
,
CS
4
“00”
“1”
“1”
“1”
CS
0
CS
1
CS
2
= “0”
CS
3
CC mode block
OSD mode block
EXOSD mode block
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| M37271MF-220SP | 制造商:MITSUBISHI 制造商全稱: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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