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IMPLEMENTATION OF SIGMA-DELTA ADC WITH ST7FLITE05/09

Figure 4. Flow Chart (Sigma-Delta Conversion)

A/D conversion from AIN1

channel, amplifier x8 included

False

True

True

False

Dlt_out:=0

inc Adc

Dlt_out:=1

inc Loop

Loop = 1024?

End of

interrupt

Initiation of a

new conversion

Nw_adc := 1

Rez := Adc

Loop := 0

Adc := 0

End of

interrupt