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參數(shù)資料
| 型號： | M38197EF-XXXFS |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁數(shù)： | 7/60頁 |
| 文件大?。?/td> | 664K |
| 代理商： | M38197EF-XXXFS |
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7
3819 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
FUNCTIONAL DESCRIPTION
Central Processing Unit (CPU)
The 3819 group uses the standard 740 family instruction set. Re-
fer to the table of 740 family addressing modes and machine
instructions or the 740 Family Software 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 is allocated at address 003B
16
. The CPU
mode register contains the stack page selection bit and the inter-
nal system clock selection bit.
Fig. BA-1 Structure of CPU mode register
Processor mode bits
b1 b0
0 0 : Single-chip mode
0 1 :
1 0 : Not available
1 1 :
Stack page selection bit
0 : RAM in the zero page is used as stack area
1 : RAM in page 1 is used as stack area
X
COUT
drivability selection bit
0 : Low drive
1 : High drive
Port X
C
switch bit
0 : I/O port function
1 : X
CIN
-X
COUT
oscillating function
Main clock (X
IN
-X
OUT
) stop bit
0 : Oscillating
1 : Stopped
Main clock division ratio selection bit
0 : f(X
IN
)/2 (high-speed mode)
1 : f(X
IN
)/8 (middle-speed mode)
Internal system clock selection bit
0 : X
IN
-X
OUT
selected (middle/high-speed mode)
1 : X
CIN
-X
COUT
selected (low-speed mode)
b7
CPU mode register
(CPUM (CM) : address 003B
16
)
b0
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