Datasheet

Table Of Contents
Section 17 D/A Converter
Page 622 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
[1] Write the conversion data to DADR_0.
[2] Set the DAOE0 bit in DACR01 to 1. D/A conversion is started. The conversion result is output
after the conversion time t
DCONV
has elapsed. The output value is expressed by the following
formula:
DADR contents
——————— × Vref
256
The conversion results are output continuously until DADR_0 is written to again or the
DAOE0 bit is cleared to 0.
[3] If DADR_0 is written to again, the conversion is immediately started. The conversion result is
output after the conversion time t
DCONV
has elapsed.
[4] If the DAOE0 bit is cleared to 0, analog output is disabled.
Conversion data 1
Conversion
result 1
High-impedance state
t
DCONV
DADR0
write cycle
DA0
DAOE0
DADR_0
Address
φ
DACR
write cycle
Conversion data 2
Conversion
result 2
t
DCONV
Legend:
t
DCONV
: D/A conversion time
DADR0
write cycle
DACR
write cycle
Figure 17.2 Example of D/A Converter Operation