AN1712/0304

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Rev. 1.0

AN1712

APPLICATION NOTE

GENERATING A HIGH RESOLUTION

SINEWAVE USING ST7 PWMART

By Microcontroller Division Applications

INTRODUCTION

The purpose of this application note is to present a software technique for generating a high

resolution sinewave using ST7 PWMART, tunable in frequency and average amplitude. This

application has been implemented using the ST72321J9 microcontroller. The PWMART (Au-

toreload timer peripheral embedded in the microcontroller) is used to generate a PWM signal

and this PWM signal is then filtered by low pass filter (simple RC circuit) to generate a sine-

wave.

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