MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 193

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Technical Data — MC68HC912DT128A
13.1 Contents
13.2 Introduction
MC68HC912DT128A — Rev 4.0
MOTOROLA
13.2
13.3
13.4
13.5
The oscillator implementation on the original 0.65µ (non-suffix) HC12 D-
family is a ‘Colpitts Oscillator with Translated Ground’. This design was
carried over to the first 0.5µ devices (A-suffix), up to the 0L05H mask set,
and is described in Section
Specification. In this section of the document, the term
MC68HC912DT128A refers only to the MC68HC912DT128A and
MC68HC912DG128A devices.
On mask set 1L05H, the Colpitts oscillator was updated, primarily to
improve its performance. To maximise the benefit of this change,
different external component values are required. However, the
oscillator will perform at least as well as the MC68HC912DT128A
version with the same components. This implementation and the
changes are described in section
Oscillator
MC68HC912Dx128C refers only to the MC68HC912DT128C and
MC68HC912DG128C devices.
In order to make the HC12 D-family oscillator options more flexible, a
Pierce oscillator configuration has been implemented on the 2L05H
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
MC68HC912DT128A Oscillator Specification . . . . . . . . . . . .194
MC68HC912Dx128C Colpitts Oscillator Specification . . . . . . 197
MC68HC912Dx128P Pierce Oscillator Specification . . . . . . . 212
Specification. In this section of the document, the term
Oscillator
13.3 MC68HC912DT128A Oscillator
13.4 MC68HC912Dx128C Colpitts
Section 13. Oscillator
Technical Data
Oscillator
Contents
193