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Selecting and Testing 32.768 kHz Crystal Oscillators for AVR® Microcontrollers AN2648
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1
Crystal Oscillator Basics
AN2648
Introduction
Features
1
Crystal Oscillator Basics
1.1
Introduction
1.2
The Oscillator
1.3
Electrical Model
1.4
Equivalent Series Resistance (ESR)
1.5
Q-Factor and Stability
1.6
Start-Up Time
1.7
Temperature Tolerance
1.8
Drive Strength
2
PCB Layout and Design Considerations
3
Testing Crystal Oscillation Robustness
4
Test Firmware
5
Crystal Recommendations
6
Oscillator Module Overview
7
Revision History
Microchip Information
1 Crystal Oscillator Basics
