AN1712 Datasheet, PDF (1/14 Pages) STMicroelectronics – GENERATING A HIGH RESOLUTION SINEWAVE USING ST7 PWMART

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.
AN1712/0304
Rev. 1.0
1/14
1