參數(shù)資料
型號: M34583EDFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP32
封裝: 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁數(shù): 117/155頁
文件大?。?/td> 985K
代理商: M34583EDFP
Rev.3.00
Aug 06, 2004
page 62 of 151
REJ03B0009-0300Z
4583 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Fig. 52 Switch to ceramic resonance/RC oscillation/quartz-crystal oscillation
Reset
On-chip oscillator operation
CMCK instruction
CRCKinstruction
Main clock: ceramic resonance
On-chip oscillator: operating
System clock: on-chip oscillator clock
CYCK instruction
Set the main clock (f(XIN)) oscillation by bit 1 of register MR.
Switch the system clock by bit 0 of register MR.
Also, when system clock is switched after main clock oscillation is started,
generate the oscillation stabilizing wait time by program if necessary.
Set the on-chip oscillator clock oscillation by register RG.
Main clock: RC oscillation circuit
On-chip oscillator: operating
System clock: on-chip oscillator clock
Main clock: Quartz-crystal circuit
On-chip oscillator: operating
System clock: on-chip oscillator clock
(1) Main clock generating circuit (f(XIN))
The ceramic resonator, RC oscillation or quartz-crystal oscillator
can be used for the main clock of this MCU.
After system is released from reset, the MCU starts operation by
the clock output from the on-chip oscillator which is the internal os-
cillator.
When the ceramic resonator is used, execute the CMCK instruc-
tion. When the RC oscillation is used, execute the CRCK
instruction. When the quartz-crystal oscillator is used, execute the
CYCK instruction. The oscillation start/stop of main clock f(XIN) is
controlled by bit 1 of register MR. The system clock is selected by
bit 0 of register MR. The oscillation circuit by the CMCK, CRCK or
CYCK instruction can be selected only at once. The oscillation cir-
cuit corresponding to the first executed one of these instructions is
valid.
Execute the CMCK, CRCK or CYCK instruction in the initial setting
routine of program (executing it in address 0 in page 0 is recom-
mended). Also, when the CMCK, CRCK or CYCK instruction is not
executed in program, this MCU operates by the on-chip oscillator.
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