HD6432670 Hitachi, HD6432670 Datasheet - Page 784

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

17.5
17.5.1
It is possible to enable/disable the D/A converter operation using the module stop control register,
the D/A converter does not operate by the initial value of the register. The register can be accessed
by releasing the module stop mode. For details, see section 22, Power-Down Modes.
17.5.2
If D/A conversion is enabled and this LSI enters software standby mode, D/A output is held and
analog power supply current remains at the same level during D/A conversion. When the analog
power supply current is required to go low in software standby mode, bits DAOE0 to DAOE3 and
DAE should be cleared to 0, and D/A output should be disabled.
Rev. 2.0, 04/02, page 738 of 906
ø
Address
DADR0
DAOE0
DA0
Legend
t
DCONV
Usage Notes
Setting for Module Stop Mode
D/A Output Hold Function in Software Standby Mode
: D/A conversion time
High-impedance state
write cycle
DADR0
Figure 17.2 Example of D/A Converter Operation
write cycle
DACR01
Conversion data 1
t
DCONV
Conversion
result 1
write cycle
DADR0
t
DCONV
Conversion data 2
Conversion
result 2
write cycle
DACR01