MC68HC705P9CDW FREESCALE [Freescale Semiconductor, Inc], MC68HC705P9CDW Datasheet - Page 27

• Manufacturer Part Number: MC68HC705P9CDW
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

2.3.2 OSC1 and OSC2
2.3.2.1 Crystal Connections
MC68HC705P9 — Rev. 4.0
MOTOROLA
NOTE:
The OSC1 and OSC2 pins are the connections for the on-chip oscillator.
The oscillator can be driven by any of the following:
The frequency of the on-chip oscillator is f
internal oscillator output by two to produce the internal clock with a
frequency of f
The circuit in
typical crystal oscillator circuit
for an AT-cut, parallel resonant
crystal. Follow the crystal
supplier’s recommendations, as
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
include all stray layout
capacitances. To minimize
output distortion, mount the
crystal and capacitors as close
as possible to the pins.
Use an AT-cut crystal. Do not use a strip or tuning fork crystal. The MCU
may overdrive or have the incorrect characteristic impedance for a strip
or tuning fork crystal.
•
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
Crystal
Ceramic resonator
External clock signal
Go to: www.freescale.com
Figure 2-3
OP
.
Pin Descriptions
shows a
Figure 2-3. Crystal Connections
27 pF
OSC
. The MCU divides the
10 M
XTAL
MCU
27 pF
Pin Descriptions
Technical Data
Pin Functions
27