參數(shù)資料
型號: MC68HC705KJ1CDW
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Computer Operation Properly Module
中文描述: 電腦操作正確模塊
文件頁數(shù): 103/108頁
文件大?。?/td> 718K
代理商: MC68HC705KJ1CDW
RC Oscillator Connections (No External Resistor)
MC68HC705KJ1 MC68HRC705KJ1 MC68HLC705KJ1 Data Sheet, Rev. 4.1
Freescale Semiconductor
103
A.4 RC Oscillator Connections (No External Resistor)
For maximum cost reduction, the RC oscillator mask connections shown in
Figure A-3
allow the on-chip
oscillator to be driven with
no
external components. This can be accomplished by programming the
oscillator internal resistor (OSCRES) bit in the mask option register to a logic 1. When programming the
OSCRES bit for the MC68HRC705KJ1, an internal resistor is selected which yields typical internal
oscillator frequencies as shown in
Figure A-4
. The internal resistance for this device is different than the
resistance of the selectable internal resistor on the MC68HC705KJ1 and the MC68HRC705KJ1 devices.
Figure A-3. RC Oscillator Connections (No External Resistor)
MCU
V
DD
V
SS
C1
C2
OSC1
OSC2
O
O
R
(EXTERNAL CONNECTIONS LEFT OPEN)
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