MC81F4204 Datasheet, PDF (86/150 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC81F4204
13. OSCILLATION CIRCUITS
There are few example circuits for main oscillators.
Oscillation circuit is designed to be used either with a ceramic resonator or crystal oscillator. Since
each crystal and ceramic resonator have their own characteristics, the user should consult the crystal
manufacturer for appropriate values of external components.
13.1 Main Oscillation Circuits
XIN
XOUT
C1
C2
C1, C2 = 10 ~ 30 pF
* The example load capacitor value(C1, C2) is
common value but may not be appropriate for
some crystal or ceramic resonator.
Figure 13-1 Crystal/Ceramic Oscillator
XIN
XOUT
Figure 13-2 External Clock
Xout pin can be used as a normal pin.
Figure 13-3 External RC Oscillator
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October 19, 2009 Ver.1.35