MC9S12DG128MPVE Datasheet, PDF (59/128 Pages) Freescale Semiconductor, Inc – Device User Guide

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EXTAL
MCU
XTAL
C_DC *
C₁
Crystal or
ceramic resonator
C₂
VSSPLL
* Due to the nature of a translated ground Colpitts oscillator a
DC voltage bias is applied to the crystal
Please contact the crystal manufacturer for crystal DC
bias conditions and recommended capacitor value C_DC.
Figure 2-4 Colpitts Oscillator Connections (PE7=1)
EXTAL
MCU
XTAL
R_B
R_S*
C₁
Crystal or
ceramic resonator
C₂
VSSPLL
* Rs can be zero (shorted) when used with higher frequency crystals.
Refer to manufacturer’s data.
Figure 2-5 Pierce Oscillator Connections (PE7=0)
EXTAL
MCU
XTAL
CMOS-COMPATIBLE
EXTERNAL OSCILLATOR
(VDDPLL-Level)
not connected
Figure 2-6 External Clock Connections (PE7=0)
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