参数资料
型号: M38B79FFFP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 4.2 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件页数: 19/112页
文件大小: 1862K
代理商: M38B79FFFP
38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
11
[CPU Mode Register (CPUM)] 003B16
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 003B16.
Fig. 7 Structure of CPU mode register
CPU mode register
(CPUM: address 003B16)
b7
b0
Processor mode bits
b1b0
0 0 : Single-chip mode
0 1 :
1 0 :
Not available
1 1 :
Port XC switch bit
0 : I/O port function
1 : XCIN–XCOUT oscillating function
Main clock (XIN–XOUT) stop bit
0 : Oscillating
1 : Stopped
Main clock division ratio selection bit
0 : f(XIN) (high-speed mode)
1 : f(XIN)/4 (middle-speed mode)
Internal system clock selection bit
0 : XIN-XOUT selection (middle-/high-speed mode)
1 : XCIN-XCOUT selection (low-speed mode)
Stack page selection bit
0 : Page 0
1 : Page 1
Not used (return “1” when read)
(Do not write “0” to this bit.)
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