Motorola MC9S12C-Family, MC9S12GC-Family warranty Colpitts Oscillator Connections PE7=1

Models: MC9S12C-Family MC9S12GC-Family

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EXTAL

MCU

XTAL

CDC *

Device User Guide — 9S12C128DGV1/D V01.05

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

Figure 2-5 Colpitts Oscillator Connections (PE7=1)

EXTAL

MCU

XTAL

RB

RS*

C1

Crystal or ceramic resonator

C2

VSSPLL

*Rs can be zero (shorted) when use with higher frequency crystals. Refer to manufacturer’s data.

Figure 2-6 Pierce Oscillator Connections (PE7=0)

EXTAL CMOS-COMPATIBLE EXTERNAL OSCILLATOR

(VDDPLL-Level)

MCU

XTAL

not connected

Figure 2-7 External Clock Connections (PE7=0)

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Page 59
Image 59
Motorola MC9S12C-Family, MC9S12GC-Family warranty Colpitts Oscillator Connections PE7=1, Pierce Oscillator Connections PE7=0