MC912D60ACPVE8 Datasheet, PDF (202/460 Pages) Freescale Semiconductor, Inc – MC68HC912D60A MC68HC912D60C MC68HC912D60P Technical Data

Oscillator
• VDDPLL Setting — The Voltage applied to the VDDPLL pin
(Logic 1 means VDDPLL is tied to the same potential as VDD).
• Resonator Frequency — The frequency of oscillation of the
resonator.
• Maximum ESR — The maximum effective series resistance
(ESR) of the resonator. This figure must include any increases
due to ageing, power dissipation, temperature, process variation
or particle contamination.
12.5.3 Important Information For Calculating Component Values
Before attempting to apply the information in section 12.5.2.4 Key
Parameters, the following data from the resonator vendor is required:
• Resonator Frequency (f)
• Maximum ESR (R, ESR, or R1)
• Maximum Shunt Capacitance (C0)
• Load Capacitance (CL) — this is not the external component
values but rather the capacitance applied in parallel with the
resonator during the tuning procedure.
12.5.3.1 How to Use This Information
The following tables provide Maximum ESR vs. component value for
various frequencies. This table should be used in the following manner:
1. Choose the set of component values corresponding to the correct
maximum shunt capacitance (equal to the sum of EXTAL–XTAL
parasitics in excess of 0.1pF, plus the C0 of the resonator) and
VDDPLL setting.
2. Determine the range of components for which the Maximum ESR
is greater than the absolute maximum ESR of the resonator
(including ageing, power dissipation, temperature, process
Technical Data
202
Oscillator
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor