HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 596

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

20.4
The D/A converter incorporates two channels of the D/A circuits and can be converted
individually.
When the DAOE bit in DACR is set to 1, D/A conversion is enabled and conversion results are
output.
An example of D/A conversion of channel 0 is shown below. The operation timing is shown in
figure 20.2.
1. Write conversion data to DADR0.
2. When the DAOE0 bit in DACR is set to 1, D/A conversion starts. After the interval of t
3. Conversion starts immediately after DADR0 is modified. After the interval of t
4. When the DAOE0 bit is cleared to 0, analog output is disabled.
Rev. 2.0, 08/02, page 556 of 788
conversion results are output from the analog output pin DA0. The conversion results are
output continuously until DADR0 is modified or the DAOE0 bit is cleared to 0. The output
value is calculated by the following formula:
conversion results are output.
DADR contents/256
Legend
tDCONV: D/A conversion time
ø
Address
DADR0
DAOE0
DA 0
Operation
DADR0
write cycle
High impedance state
Figure 20.2 D/A Converter Operation Example
AVref
DACR
write cycle
Conversion data
t
DCONV
Conversion result
(1)
DADR0
write cycle
(1)
t
DCONV
Conversion data
Conversion
result
DACR
write cycle
(2)
(2)
DCONV
,
DCONV
,