UPD17062 datasheet(239/298 Pages) RENESAS

239 / 298 page

237

µPD17062

19.6

EXAMPLE OF A/D CONVERSION PROGRAM

The following example shows an A/D conversion program based on the successive comparison method.

The result of conversion is held in the DBF0.

Sample program

DBF0B3

FLG 0.0FH.3

DBF0B2

FLG 0.0FH.2

DBF0B1

FLG 0.0FH.1

DBF0B0

FLG 0.0FH.0

START:

BANK0

INITFLG

DBF0B3, NOT DBF0B2, NOT DBF0B1, NOT DBF0B0 ; Sets DBF data.

PUT

ADCR, DBF

; Sets reference voltage.

SKT1

ADCCMP

; Judges comparison result.

CLR1

DBF0B3

; DBF0B3

← 0

SET1

DBF0B2

; DBF0B2

← 1

PUT

ADCR, DBF

; Sets reference voltage.

SKT1

ADCCMP

; Judges comparison result.

CLR1

DBF0B2

; DBF0B2

← 0

SET1

DBF0B1

; DBF0B1

← 1

PUT

ADCR, DBF

; Sets reference voltage.

SKT1

ADCCMP

; Judges comparison result.

CLR1

DBF0B1

; DBF0B1

← 0

SET1

DBF0B0

; DBF0B0

← 1

PUT

ADCR, DBF

; Sets reference voltage.

SKT1

ADCCMP

; Judges comparison result.

CLR1

DBF0B0

; DBF0B0

← 0

END:

Number of steps in the conversion loop : 17

Conversion time : 34

µs (not in DMA mode)

Conversion time : 204

µs (in DMA mode)

UPD17062 Fiches technique(PDF) 239 Page - Renesas Technology Corp

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