mc68hc11d0cfn2 Freescale Semiconductor, Inc, mc68hc11d0cfn2 Datasheet - Page 17

• Manufacturer Part Number: mc68hc11d0cfn2
• Description: M68hc11 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

1.7 Crystal Driver and External Clock Input (XTAL and EXTAL)
MC68HC711D3 — Rev. 2
MOTOROLA
These two pins provide the interface for either a crystal or a CMOS compatible
clock to control the internal clock generator circuitry. The frequency applied to
these pins is four times higher than the desired E-clock rate. Refer to
for crystal and clock connections.
*
FIRST MCU
Values includes all stray capacitances.
MCU
MCU
Freescale Semiconductor, Inc.
EXTAL
EXTAL
EXTAL
XTAL
XTAL
XTAL
For More Information On This Product,
10K–100K
10 M
10 M
NC OR
LOAD
Go to: www.freescale.com
General Description
Figure 1-5. Oscillator Connections
CRYSTAL
CRYSTAL
4 x E
4 x E
Crystal Driver and External Clock Input (XTAL and EXTAL)
4 x E
CMOS-COMPATIBLE
EXTERNAL OSCILLATOR
25 pF *
25 pF *
25 pF *
25 pF *
10K–100K
NC OR
LOAD
General Description
Figure 1-5
SECOND MCU
EXTAL
XTAL
Data Sheet
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