MC68HC908JG16FA MOTOROLA [Motorola, Inc], MC68HC908JG16FA Datasheet - Page 92
MC68HC908JG16FA
Manufacturer Part Number
MC68HC908JG16FA
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908JG16FA.pdf
(324 pages)
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Oscillator (OSC)
7.3 Oscillator External Connections
Technical Data
92
In its typical configuration, the oscillator requires five external
components. The crystal oscillator is normally connected in a Pierce
oscillator configuration, as shown in
the logical representation of the internal components and may not
represent actual circuitry. The oscillator configuration uses five
components:
The series resistor (R
oscillator guidelines and may not be required for all ranges of operation,
especially with high-frequency crystals. Refer to the crystal
manufacturer’s data for more information.
FROM SIM
•
•
•
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
SIMOSCEN
Crystal, X
Fixed capacitor, C
Tuning capacitor, C
Feedback resistor, R
Series resistor, R
MCU
Figure 7-1. Oscillator External Connections
Go to: www.freescale.com
1
OSC1
Oscillator (OSC)
(nominally 12MHz)
C1
12 MHz
S
R
X1
) is included in the diagram to follow strict Pierce
B
S
1
(not required for 12MHz)
OSCXCLK
2
B
(can also be a fixed capacitor)
OSC2
R
C2
S
*
Figure
DOUBLER
CLOCK
* R
higher frequency crystals.
Refer to manufacturer’s data.
S
2
can be 0 (shorted) when used with
7-1. This figure shows only
OSCDCLK
MC68HC908JG16
TO COP, SCI
TO USB
2
OSCOUT
MOTOROLA
—
Rev. 1.0
TO SIM
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