參數(shù)資料
型號(hào): M38503G4A-XXXFP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PDSO42
封裝: 8.40 X 17.5 MM, 0.80 MM PITCH, PLASTIC, SSOP-42
文件頁(yè)數(shù): 2/59頁(yè)
文件大小: 885K
代理商: M38503G4A-XXXFP
Rev.2.13
Apr 17, 2009
Page 10 of 56
REJ03B0125-0213
3850 Group (Spec.A QzROM version)
[CPU Mode Register (CPUM)] 003B16
The CPU mode register contains the stack page selection bit,
the internal system clock control bits, 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
Stack page selection bit
0 : 0 page
1 : 1 page
Processor mode bits
b1 b0
0
0 : Single-chip mode
01 :
1
0 :
Not available
11 :
Main clock division ratio selection bits
b7 b6
00
:
φ = f(XIN)/2 (high-speed mode)
01
:
φ = f(XIN)/8 (middle-speed mode)
10
:
φ = f(XCIN)/2 (low-speed mode)
1
: Not available
Fix this bit to “1”.
Port XC switch bit
0 : I/O port function (stop oscillating)
1: XCIN-XCOUT oscillating function
Main clock (XIN-XOUT) stop bit
0 : Oscillating
0 : Stopped
1
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