AP-155 Oscillators for Microcontrollers

Intel's microcontroller families MCS(R) 48, MCS(R) 51, and MCS(R) 96 contain a circuit that is commonly referred to as the ``on-chip oscillator''. The on-chip cir- cuitry is not itself an oscillator, of course, but an ampli- fier that is suitable for use as the amplifier part of a feedback oscillator. The data sheets and Microcontoller Handbook show how the on-chip amplifier and several off-chip components can be used to design a working oscillator. With proper selection of off-chip compo- nents, these oscillator circuits will perform better than almost any other type of clock oscillator, and by almost any criterion of excellence. The suggested circuits are simple, economical, stable, and reliable.

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