參數(shù)資料
型號: M38049FFLWG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PBGA64
封裝: 6 X 6 MM, 0.65 MM PITCH, PLASTIC, LGA-64
文件頁數(shù): 38/131頁
文件大?。?/td> 1740K
代理商: M38049FFLWG
Rev.1.00
Oct 27, 2008
Page 12 of 128
REJ03B0266-0100
3804 Group (Spec.L)
[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. 9
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”.
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
1 : Stopped
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