參數(shù)資料
型號: M3455AG8-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP52
封裝: 10 X 10 MM, 0.65 MM PITCH, PLASTIC, LQFP-52
文件頁數(shù): 128/150頁
文件大?。?/td> 1818K
代理商: M3455AG8-XXXFP
Rev.1.02
Nov 26, 2008
Page 77 of 146
REJ03B0224-0102
455A Group
Note 1. “R” represents read enabled, and “W” represents write enabled.
Note 2. The stopped clock cannot be selected for system clock.
Note 3. The oscillation circuit selected for system clock cannot be stopped.
Clock control register MR
at reset : 11002
at power down : state retained
R/W
TAMR/TMRA
MR3
Operation mode selection bits
MR3 MR2
Operation mode
0
Through mode
0
1
Frequency divided by 2 mode
MR2
1
0
Frequency divided by 4 mode
1
Frequency divided by 8 mode
MR1
System clock selection bits (Note 2)
MR1 MR0
System clock
0
f(HSOCO)
MR0
01
f(XIN)
10
f(XCIN)
1
f(LSOCO)
Clock control register RG
at reset : 10002
at power down : state retained
W
TRGA
RG3
Low-speed on-chip oscillator (f(LSOCO))
control bit (Note 3)
0
Low-speed on-chip oscillator (f(LSOCO)) oscillation available
1
Low-speed on-chip oscillator (f(LSOCO)) oscillation stop
RG2 Sub-clock (f(XCIN)) control bit (Note 3)
0
Sub-clock (f(XCIN)) oscillation available, ports D6 and D7 not selected
1
Sub-clock (f(XCIN)) oscillation stop, ports D6 and D7 selected
RG1 Main-clock (f(XIN)) control bit (Note 3)
0
Main clock (f(XIN)) oscillation available
1
Main clock (f(XIN)) oscillation stop
RG0
High-speed on-chip oscillator (f(HSOCO))
control bit (Note 3)
0
High-speed on-chip oscillator (f(HSOCO)) oscillation available
1
High-speed on-chip oscillator (f(HSOCO)) oscillation stop
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