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| MC68HC08AS32A Datasheet, PDF (285/296 Pages) Motorola, Inc – Microcontrollers | |||
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Freescale Semiconductor, Inc.
Electrical Specifications
CGM Operating Conditions
18.9 CGM Operating Conditions
Characteristic
Crystal reference frequency
Range nominal multiplier
VCO center-of-range frequency(1)
Medium voltage VCO center-of-range frequency
VCO frequency multiplier
VCO center-of-range multiplier
VCO operating frequency
1. 5.0 V ± 10% VDD only
Symbol
fxclk
fnom
fvrs
N
L
fvclk
Min
1
â
4.9152
4.9152
1
1
fvrsmin
Typ
â
4.9152
â
â
â
â
â
Max
8
â
32.8
16.4
15
15
fvrsmax
Unit
MHz
MHz
MHz
MHz
â
â
MHz
18.10 CGM Component Information
Characteristic
Symbol
Min
Typ
Max
Crystal (X1) frequency (MHz)(1)
fxclk
1
4.9152
8
Crystal load capacitance(2)
Crystal fixed capacitance(2)
Crystal tuning capacitance(2)
Feedback bias resistor
Series resistor(3)
Filter capacitor
CL
â
20
â
C1
â
2 Ã CL
â
C2
â
2 Ã CL
â
RB
â
1
10
RS
0
â
3.3
CF
â
CFact à (VDDA/fxclk)
â
Bypass capacitor(4)
Cbyp
â
0.1
â
1. Fundamental mode crystals only
2. Consult crystal manufacturerâs data.
3. Not required
4. Cbyp must provide low AC impedance from f = fxclk/100 to 100 Ã fvclk, so series resistance must be considered.
Unit
MHz
pF
pF
pF
Mâ¦
kâ¦
nF
µF
MC68HC08AS32A â Rev. 1
MOTOROLA
Electrical Specifications
For More Information On This Product,
Go to: www.freescale.com
Data Sheet
285
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