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Application Notes/
Technical Brief
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FACT001
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Title:
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Basic PIC16/17 Oscillator Design
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Name:
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FACT001
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Date:
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4/10/02
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Author:
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Dan Mathews
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Description:
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The oscillator circuit is one of the most overlooked areas of microprocessor circuit design. Components are usually selected based on the manufacturers? tables. If the circuit starts up and works, fine, no other thought need be given to it, right? Wrong. Many conditions can negatively affect the performance of your design. Higher temperatures and lower supply voltages can lower the loop gain in the oscillator circuit, causing poor, slow, or no start-up. Colder temperatures and higher supply voltages can increase the loop gain of the oscillator circuit, causing the crystal to be overdriven, and potentially damaged; or the circuit can be forced to another harmonic and throw off the timing, or
cease functioning altogether. It is also possible to waste power through the improper selection of components or Clock modes.
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Keywords:
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FACT001, PIC16/17, Oscillator, Clock Mode
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Related Information
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App Notes and Source Code
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FACT001
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