MC912DG128ACPVE Datasheet, PDF (194/478 Pages) Freescale Semiconductor, Inc – Upward compatible with M68HC11 instruction set

Oscillator
Freescale Semiconductor, Inc.
mask set. This implementation, described in section 13.5
MC68HC912Dx128P Pierce Oscillator Specification, utilises the
Automatic Level Control circuit to provide a lower power oscillator than
traditional Pierce oscillators based on simple inverter circuits. In this
section of the document, the term MC68HC912Dx128P refers only to the
MC68HC912DT128P and MC68HC912DG128P devices.
In the following sections, each particular oscillator implementation is
described in detail. Refer to the appropriate sections for the mask set
being used and optimum external component selection.
13.3 MC68HC912DT128A Oscillator Specification
This section applies to the 0L05H mask set and all previous
MC68HC912DT128A versions.
13.3.1 MC68HC912DT128A Oscillator Design Architecture
The Colpitts oscillator architecture is shown in Figure 13-1. The
component configuration for this oscillator is the same as all previous
MC68HC912DT128A configurations.
Technical Data
194
MC68HC912DT128A — Rev 4.0
Oscillator
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