HD6413007F20 Datasheet, PDF (569/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

16. D/A Converter
Bit 5⎯D/A Enable (DAE): Controls D/A conversion, together with bits DAOE0 and DAOE1.
When the DAE bit is cleared to 0, analog conversion is controlled independently in channels 0
and 1. When the DAE bit is set to 1, analog conversion is controlled together in channels 0 and 1.
Output of the conversion results is always controlled independently by DAOE0 and DAOE1.
Bit 7 Bit 6 Bit 5
DAOE1 DAOE0 DAE
0
0
⎯
1
0
1
1
0
0
1
1
⎯
Description
D/A conversion is disabled in channels 0 and 1
D/A conversion is enabled in channel 0
D/A conversion is disabled in channel 1
D/A conversion is enabled in channels 0 and 1
D/A conversion is disabled in channel 0
D/A conversion is enabled in channel 1
D/A conversion is enabled in channels 0 and 1
D/A conversion is enabled in channels 0 and 1
When the DAE bit is set to 1, even if bits DAOE0 and DAOE1 in DACR and the ADST bit in
ADCSR are cleared to 0, the same current is drawn from the analog power supply as during A/D
and D/A conversion.
Bits 4 to 0⎯Reserved: These bits cannot be modified and are always read as 1.
16.2.3 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
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
⎯
⎯ DASTE
Initial value
1
1
1
1
1
1
1
0
Read/Write
⎯
⎯
⎯
⎯
⎯
⎯
⎯
R/W
Reserved bits
D/A standby enable
Enables or disables D/A output
in software standby mode
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.
Rev.5.00 Sep. 12, 2007 Page 539 of 764
REJ09B0396-0500