MC912DG128ACPVE Datasheet, PDF (212/478 Pages) Freescale Semiconductor, Inc – Upward compatible with M68HC11 instruction set

Oscillator
Freescale Semiconductor, Inc.
• Minimize XTAL and EXTAL routing lengths to reduce EMC
issues.
NOTE:
EXTAL and XTAL routing resistances are less important than
capacitances. Using minimum width traces is an acceptable trade-off to
reduce capacitance.
13.5 MC68HC912Dx128P Pierce Oscillator Specification
This section applies to the 2L05H mask set, which refers to the newest
set of CGM fixes (to the MC68HC912DT128A) with the Pierce oscillator
configuration enabled. The name for these devices is
MC68HC912Dx128P.
13.5.1 MC68HC912Dx128P Oscillator Design Architecture
The Pierce oscillator architecture is shown in Figure 13-4. The
component configuration for this oscillator is different to all previous
MC68HC912DT128A configurations and the recommended
components may be different.
Please note carefully the connection of external capacitors and the
resonator in this diagram.
Technical Data
212
MC68HC912DT128A — Rev 4.0
Oscillator
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