参数资料
型号: M38220E5DFP
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: 14/78页
文件大小: 998K
代理商: M38220E5DFP
14
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
3822 Group
MITSUBISHI MICROCOMPUTERS
[CPU Mode Register (CPUM)] 003B
16
The CPU mode register contains the stack page selection bit and
the internal system clock selection bit.
The CPU mode register is allocated at address 003B
16
.
Fig. 11 Structure of CPU mode register
Not available
Processor mode bits
b1 b0
0 0 : Single-chip mode
0 1 :
1 0 :
1 1 :
Stack page selection bit
0 : 0 page
1 : 1 page
Not used (returns
1
when read)
(Do not write
0
to this bit)
Port X
C
switch bit
0 : I/O port function (stop oscillating)
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)
CPU mode register
(CPUM (CM) : address 003B
16
)
b7
b0
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