MC68HC05P9ACDW FREESCALE [Freescale Semiconductor, Inc], MC68HC05P9ACDW Datasheet - Page 16

• Manufacturer Part Number: MC68HC05P9ACDW
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Pin Descriptions
Crystal
Connections
Ceramic
Resonator
Connections
16
NOTE:
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.
To reduce cost, use a ceramic
resonator in place of the crystal.
Figure 5
resonator circuit. For the values
of any external components,
follow the recommendations of
the resonator manufacturer. The
load capacitance values used in
the oscillator circuit design
should include all stray layout
capacitances. To minimize
output distortion, mount the
resonator and capacitors as
close as possible to the pins.
Freescale Semiconductor, Inc.
For More Information On This Product,
shows a ceramic
Go to: www.freescale.com
Figure 4
Pin Descriptions
shows a
Figure 4. Crystal Connections
Figure 5. Ceramic Resonator
27 pF
Connections
RESONATOR
CERAMIC
10 M
MCU
XTAL
MCU
27 pF
8-mc68hc05p9a
MOTOROLA