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| 型号： | M38748EAF-XXXFS |
| 厂商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 单芯片8位CMOS微机 |
| 文件页数： | 11/92页 |
| 文件大小： | 1292K |
| 代理商： | M38748EAF-XXXFS |
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11
3874 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
FUNCTIONAL DESCRIPTION
CENTRAL PROCESSING UNIT (CPU)
The 3874 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 and SLW instructions cannot be used.
The STP, WIT, MUL, and DIV instructions can be used.
[CPU Mode Register (CPUM)] 003B
16
The CPU mode register contains the stack page selection bit and
the internal system clock selection bit etc.
The CPU mode register is allocated at address 003B
16
.
Fig. 8 Structure of CPU mode register
CPU mode register
(
CPUM : address
003B
16
)
b7
b0
Stack page selection bit
0 : Page 0
X
COUT
drivability selection bit
0 : Low drive
1 : High drive
Processor mode bits
1 0 : Not available
1 1 :
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 bits
b7 b6
0 0 :
φ
= f(X
IN
)/2 (high-speed mode)
0 1 :
φ
= f(X
IN
)/8 (middle-speed mode)
1 0 :
φ
= f(X
CIN
)/2 (low-speed mode)
1 1 :
φ
= f(X
IN
) (double-speed mode)
Note:
When setting b7 to b3, refer to notes of Figure 71.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M38748EAF-XXXGP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EAT-XXXFS | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EAT-XXXGP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EBD-XXXFS | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EBD-XXXGP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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