参数资料
型号: M38C29FFAHP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 5 MHz, MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64
文件页数: 10/104页
文件大小: 1327K
代理商: M38C29FFAHP
Rev.2.00
May 28, 2004
page 11 of 100
38C2 Group (A Version)
[CPU Mode Register (CPUM)] 003B16
The CPU mode register contains the stack page selection bit and
the control bit for the internal system clock.
The CPU mode register is allocated at address 003B16.
Fig. 7 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 : RAM in the zero page is used as stack area
1 : RAM in page 1 is used as stack area
Not used (returns “ 1”
when read)
(Do not write “ 0”
to this bit.)
Main clock (XIN– XOUT) division ratio selection bits
b5 b4
0
0 : XIN/8 (frequency/8 mode)
0
1 : XIN/4 (frequency/4 mode)
1
0 : XIN/2 (frequency/2 mode)
1
1 : Not available
System clock control bits
b7 b6
0
0 : XIN stop, XCIN oscillating, system clock = XCIN
0
1 : XIN oscillating, XCIN stop, system clock = XIN
1
0 : XIN oscillating, XCIN oscillating, system clock = XCIN
1
1 : XIN oscillating, XCIN oscillating, system clock = XIN
CPU mode register
(CPUM (CM) : address 003B16)
b7
b0
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