AN2727 Freescale Semiconductor / Motorola, AN2727 Datasheet - Page 17

• Manufacturer Part Number: AN2727
• Description: Designing Hardware for the HCS12 D-Family
• Manufacturer: Freescale Semiconductor / Motorola

Oscillator Options
If a PCB is designed to allow both external circuit configurations, it should be optimized for Colpitts mode.
These guidelines are valid for single sided, double sided, and multi-layer boards. On boards with multiple
layers, it may be possible to locate the oscillator closer to the MCU by fanning out the adjacent I/O
underneath the MCU. Moving the PLL filter components to the back of the board will also help simplify the
tracking adjacent to the oscillator.
Designing Hardware for the HCS12 D-Family, Rev. 0
Freescale Semiconductor
17