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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 |
| 文件頁數(shù)： | 8/97頁 |
| 文件大?。?/td> | 1436K |
| 代理商： | M37271MF-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
8
FUNCTIONAL DESCRIPTION
Central Processing Unit (CPU)
The M37271MF-XXXSP uses the standard 740 family instruction set.
Refer to the table of 740 family addressing modes and machine in-
structions or the SERIES 740
<
Software
>
User’s Manual for details
on the instruction set.
Machine-resident 740 family instructions are as follows:
The FST, SLW instruction cannot be used.
The MUL, DIV, WIT and STP instruction can be used.
CPU Mode Register
The CPU mode register contains the stack page selection bit and
internal system clock selection bit. The CPU mode register is allo-
cated at address 00FB
16
.
Fig. 1. Structure of CPU mode register
7
0
1
1
0
0
CPU mode register
(CPUM (CM) : address 00FB
16
)
Processor mode bits
b1 b0
0 0 : Single-chip mode
0 1 :
1 0 :
1 1 :
Stack page selection bit (Note)
0 : Zero page
1 : 1 page
Fix these bits to “1.”
X
COUT
drivability selection bit
0 : Low drive
1 : High drive
Main colock (X
IN
–X
OUT
) stop bit
0 : Oscillating
1 : Stopped
Note:
Please beware of this bit when programming because it
is set to “1” after the reset release.
Internal system clock selection bit
0 : X
IN
–X
OUT
selected (high-speed mode)
1 : X
CIN
–X
COUT
selected (low-speed mode)
Not available
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