參數(shù)資料
型號(hào)： M38073M4-214FP
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)： 7/74頁
文件大小： 1182K
代理商： M38073M4-214FP
7
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FUNCTIONAL DESCRIPTION
Central Processing Unit (CPU)
The 3807 group uses the standard 740 family instruction set. Refer
to the table of 740 family addressing modes and machine instruc-
tions or the SERIES 740 <Software> User′s Manual for details on
the instruction set.
Machine-resident 740 family instructions are as follows:
The FST and SLW instructions cannot be used.
The MUL, DIV, WIT and STP instruction can be used.
The central processing unit (CPU) has the six registers.
CPU Mode Register
The CPU mode register contains the stack page selection bit and
processor mode bits. The CPU mode register is allocated at address
003B
16
.
CPU mode register
(
CPUM : address
003B
16
)
Processor mode bits
b1 b0
0 0 : Single-chip mode
0 1 : Memory expansion mode
1 0 : Microprocessor mode
1 1 : Not available
b7
b0
Stack page selection bit
0 : 0 page
1 : 1 page
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 : Not available
Port X
C
switch bit
0 : I/O port function (stop oscillating)
1 : X
CIN
-X
COUT
oscillating
function
X
COUT
drivability selection bit
0 : Low drive
1 : High drive
Fig. 5. Structure of CPU mode register
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