D/A Standby Control Register (Dastcr); Operation - Hitachi H8/3008 Hardware Manual

15.2.3

D/A Standby Control Register (DASTCR)

DASTCR is an 8-bit readable/writable register that enables or disables D/A output in software
standby mode.
Bit
Initial value
Read/Write
DASTCR is initialized to H'FE by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bits 7 to 1—Reserved: These bits cannot be modified and are always read as 1.
Bit 0—D/A Standby Enable (DASTE): Enables or disables D/A output in software standby
mode.
Bit 0
DASTE Description
0 D/A output is disabled in software standby mode
1 D/A output is enabled in software standby mode
15.3

Operation

The D/A converter has two built-in D/A conversion circuits that can perform conversion
independently.
D/A conversion is performed constantly while enabled in DACR. If the DADR0 or DADR1 value
is modified, conversion of the new data begins immediately. The conversion results are output
when bits DAOE0 and DAOE1 are set to 1.
422
7 6
— —
1 1
— —
5 4
— —
1 1
— —
Reserved bits
3 2
— —
1 1
— —
D/A standby enable
Enables or disables D/A output
in software standby mode
1 0
— DASTE
1 0
— R/W
(Initial value)