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MC68HC705C8ACS

MC68HC705C8ACS | |
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Manufacturer Part Number | MC68HC705C8ACS |
Manufacturer | Freescale Semiconductor, Inc |
MC68HC705C8ACS datasheet |
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Freescale Semiconductor, Inc.
General Description
1.7.3 OSC1 and OSC2
The OSC1 and OSC2 pins are the control connections for the 2-pin
on-chip oscillator. The oscillator can be driven by:
•
•
•
NOTE:
The frequency of the internal oscillator is f
internal oscillator output by two to produce the internal clock with a
frequency of f
1.7.3.1 Crystal Resonator
The circuit in
crystal oscillator circuit for an AT-cut,
parallel resonant crystal. Follow the
crystal supplier’s recommendations,
because the crystal parameters
determine the external component
values required to provide reliable
startup and maximum stability. The
load capacitance values used in the
oscillator circuit design should
account for all stray layout
capacitances. To minimize output
distortion, mount the crystal and
capacitors as close as possible to the
pins.
NOTE:
Use an AT-cut crystal and not a strip or tuning fork crystal. The MCU
might overdrive or have the incorrect characteristic impedance for a strip
or tuning fork crystal.
Technical Data
30
Crystal resonator
Ceramic resonator
External clock signal
.
OP
Figure 1-8
shows a
General Description
For More Information On This Product,
Go to: www.freescale.com
. The MCU divides the
OSC
MCU
OSC2
OSC1
10 M
XTAL
2 MHz
22 pF
22 pF
Starting value only. Follow crystal supplier’s
recommendations regarding component
values that will provide reliable startup and
maximum stability.
Figure 1-8. Crystal
Connections
MC68HC705C8A — Rev. 3
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