MC68HC05K0 Datasheet, PDF (24/154 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Technical Data
Freescale Semiconductor, Inc.
1.6.2.2 Ceramic Resonator
To reduce cost, use a ceramic resonator in place of the crystal. Use the
circuit in Figure 1-5 for a 2-pin ceramic resonator or Figure 1-6 for a
3-pin ceramic resonator and follow the resonator manufacturer’s
recommendations.
MCU
2 MΩ
(MASK OPTION)
27 pF
CERAMIC
RESONATOR
C3
C4
27 pF
OSC1
OSC2
V_SS
V_DD
V_SS
C3
CER.
RES.
C4
C1 C2
V_DD
Figure 1-5. 2-Pin Ceramic Resonator Connections
MCU
2 MΩ
(MASK OPTION)
CERAMIC
RESONATOR
OSC1
OSC2
V_SS
V_DD
V_SS
CER.
RES.
C1 C2
V_DD
Figure 1-6. 3-Pin Ceramic Resonator Connections
The external component values required for maximum stability and
reliable starting depend upon the resonator parameters. The load
capacitance values used in the oscillator circuit design should account
for all stray layout capacitances. To minimize output distortion, mount
the resonator and capacitors as close as possible to the pins.
Technical Data
MC68HC05K0 • MC68HC05K1 — Rev. 2.0
General Description
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