参数资料
型号: M38858MC-XXXHP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80
封装: 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80
文件页数: 7/103页
文件大小: 1580K
代理商: M38858MC-XXXHP
3885 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
10
[CPU Mode Register (CPUM)] 003B16
The CPU mode register contains the stack page selection bit, etc.
The CPU mode register is allocated at address 003B16.
Fig. 7 Structure of CPU mode register
CPU mode register
(CPUM : address 003B16)
b7
b0
Processor mode bits
b1 b0
0
0 : Single-chip mode
0
1 : Not available
1
0 : Not available
1
1 : Not available
Port P40/P41 switch bit
0 : I/O port function (stop oscillating)
1 : XCIN–XCOUT oscillating function
Main clock (XIN–XOUT) stop bit
0 : Oscillating
1 : Stopped
Main clock division ratio selection bits
b7 b6
0
0 :
φ = f(XIN)/2 (high-speed mode)
0
1 :
φ = f(XIN)/8 (middle-speed mode)
1
0 :
φ = f(XCIN)/2 (low-speed mode)
1
1 : Not available
Stack page selection bit
0 : 0 page
1 : 1 page
Fix this bit to “1”.
1
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