H8SSLASH2214 datasheet(596/936 Pages) RENESAS

Il numero della parte	H8S/2214

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	936 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Section 13 D/A Converter

Rev.4.00 Sep. 18, 2008 Page 536 of 872

REJ09B0189-0400

13.3

Operation

D/A conversion is performed continuously while enabled by DACR. If either DADR0 is written

to, the new data is immediately converted. The conversion result is output by setting the

corresponding DAOE0 bit to 1.

The operation example described in this section concerns D/A conversion on channel 0. Figure

13.2 shows the timing of this operation.

[1] Write the conversion data to DADR0.

[2] Set the DAOE0 bit in DACR to 1. D/A conversion is started and the DA0 pin becomes an

output pin. The conversion result is output after the conversion time has elapsed. The output

value is expressed by the following formula:

DADR contents

256

× Vref

The conversion results are output continuously until DADR0 is written to again or the DAOE0

bit is cleared to 0.

[3] If DADR0 is written to again, the new data is immediately converted. The new conversion

result is output after the conversion time has elapsed.

[4] If the DAOE0 bit is cleared to 0, the DA0 pin becomes an input pin.

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