Renesas Stereo System SH7709S User Manual
Rev. 5.00, 09/03, page 637 of 760
21.2
Register Descriptions
21.2.1
D/A Data Registers 0 and 1 (DADR0/1)
Bit:
7
6
5
4
3
2
1
0
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The D/A data registers (DADR0 and DADR1) are 8-bit readable/writable registers that store the
data to be converted. When analog output is enabled, the D/A data register values are constantly
converted and output at the analog output pins.
data to be converted. When analog output is enabled, the D/A data register values are constantly
converted and output at the analog output pins.
The D/A data registers are initialized to H'00 by a reset.
21.2.2
D/A Control Register (DACR)
Bit:
7
6
5
4
3
2
1
0
DAOE1
DAOE0
DAE
—
—
—
—
—
Initial value:
0
0
0
1
1
1
1
1
R/W:
R/W
R/W
R/W
R
R
R
R
R
DACR is an 8-bit readable/writable register that controls the operation of the D/A converter.
DACR is initialized to H'1F by a reset.
DACR is initialized to H'1F by a reset.
Bit 7—D/A Output Enable 1 (DAOE1): Controls D/A conversion and analog output.
Bit 7: DAOE1
Description
0
DA1 analog output is disabled
(Initial value)
1
Channel-1 D/A conversion and DA1 analog output are enabled
Bit 6—D/A Output Enable 0 (DAOE0): Controls D/A conversion and analog output.
Bit 6: DAOE0
Description
0
DA0 analog output is disabled
(Initial value)
1
Channel-0 D/A conversion and DA0 analog output are enabled