MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 146
MC68HC908AZ32ACFU
Manufacturer Part Number
MC68HC908AZ32ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AZ32ACFU.pdf
(468 pages)
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Clock Generator Module (CGM)
8.4.4 CGM External Connections
Advance Information
146
In its typical configuration, the CGM requires seven external
components. Five of these are for the crystal oscillator and two are for
the PLL.
The crystal oscillator is normally connected in a Pierce oscillator
configuration, as shown in
representation of the internal components and may not represent actual
circuitry. The oscillator configuration uses five components:
The series resistor (R
especially with high-frequency crystals. Refer to the crystal
manufacturer’s data for more information.
Figure 8-3
Routing should be done with great care to minimize signal cross talk and
noise. (See
routing information and more information on the filter capacitor’s value
and its effects on PLL performance).
Freescale Semiconductor, Inc.
•
•
•
•
•
•
•
For More Information On This Product,
Crystal, X
Fixed capacitor, C
Tuning capacitor, C
Feedback resistor, R
Series resistor, R
Bypass capacitor, C
Filter capacitor, C
Clock Generator Module (CGM)
also shows the external components for the PLL:
Acquisition/Lock Time Specifications
Go to: www.freescale.com
1
S
) may not be required for all ranges of operation,
S
F
1
(optional)
2
BYP
Figure
B
(can also be a fixed capacitor)
8-3.
Figure 8-3
68HC908AZ32A — Rev 0.0
shows only the logical
on page 156 for
MOTOROLA
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