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15.3
Operation
The D/A converter includes D/A conversion circuits for two channels, each of which can operate
independently.
D/A conversion is performed continuously while enabled by DACR. If either DADR0 or DADR1
is written to, the new data is immediately converted. The conversion result is output by setting the
corresponding DAOE0 or DAOE1 bit to 1.
The operation example described in this section concerns D/A conversion on channel 0. Figure 15-
2 shows the timing of this operation.
[1] Write the conversion data to DADR0.
[2] Set the DAOE0 bit in DACR01 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
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.
V
ref
Rev. 5.00, 12/03, page 545 of 1088
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