參數(shù)資料
型號： HC05K3GRS
英文描述： 68HC05K3 General Release Specification
中文描述： 68HC05K3一般版本規(guī)范
文件頁數(shù)： 22/132頁
文件大?。?/td> 1188K
代理商： HC05K3GRS
Technical Data
MC68HC05K3 — Revision 4.0
22
General Description
MOTOROLA
General Description
Figure 1-5. Oscillator Connections
1.7.2.2 2-Pin C eramic Resonator Oscillator
In cost-sensitive applications, a ceramic resonator can be used instead
of the crystal. The circuit in
Figure 1-5
(a)
is designed for either a crystal
oraceramicresonator.Theresonatormanufacturer’srecommendations
should be followed, since the resonator parameters determine the
external component values required for maximum stability and reliable
starting. The load capacitance values used in the oscillator circuit design
should include all stray capacitances. The ceramic resonator and
components should be mounted as close as possible to the pins for
startup stabilization and to minimize output distortion. An internal startup
resistorofapproximately2M
isprovidedbetweenOSC1andOSC2for
the crystal/ceramic resonator oscillator mask option.
MCU
36
(a) 2-Pin Crystal or
Ceramic Resonator
Connections
OSC1
OSC2
36 pF*
2 M
(MASK OPTION)
R
UNCONNECTED
EXTERNAL CLOCK
R
C
(b) 2-Pin
RC Oscillator
Connections
(d) External
Clock Source
Connection
(c) 3-Pin
RC Oscillator
Connections
C
OSC1
OSC2
MCU
OSC1
OSC2
MCU
OSC1
OSC2
MCU
PB1/OSC3
*
Starting value only. Follow crystal
supplier’s recommendations
regarding component values that
will provide reliable startup and
maximum stability.
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