Usage Notes; Setting For Module Stop Mode; D/A Output Hold Function In Software Standby Mode - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

DADR0
write cycle
ø
Address
DADR0
DAOE0
DA0
High-impedance state
Legend
t : D/A conversion time
DCONV
18.5

Usage Notes

18.5.1

Setting for Module Stop Mode

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.
18.5.2

D/A Output Hold Function in Software Standby Mode

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, DAOE1 and
DAE should be cleared to 0, and D/A output should be disabled.
DACR01
write cycle
Conversion data 1
t
DCONV
Figure 18.2 Example of D/A Converter Operation
DADR0
write cycle
Conversion data 2
Conversion
result 1
t
DCONV
Rev. 1.0, 09/01, page 761 of 903
DACR01
write cycle
Conversion
result 2