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參數(shù)資料
| 型號： | M37274MA |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | Single Chip 8 Bits Microcomputer(8位單片機(jī)) |
| 中文描述： | 單芯片8位單片機(jī)（8位單片機(jī)） |
| 文件頁數(shù)： | 61/131頁 |
| 文件大?。?/td> | 2049K |
| 代理商： | M37274MA |
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61
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274MA-XXXSP
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. 67. Block Diagram of OSD Selection Circuit
Fig. 66. Clock Control Register
Table 14. 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
Notes 1:
When setting “10
2
,” main clock is set as a clock in the CC
mode and EXOSD mode regardless of bits 0, 3.
2:
Be sure to set bit 7 to “0” for program of the mask and the
EPROM versions. For the emulator MCU version
(M37274ERSS), be sure to set bit 7 to “1” when using the
data slicer clock for software debugging.
7
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 : Main clock (Note 1)
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 2)
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
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.”
0
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| M37274MA-052SP | 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 |
| M37274MA-053SP | 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 |
| M37274MA-082SP | 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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| M37274MA-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
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