HD6432621 Hitachi, HD6432621 Datasheet - Page 650
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
(1069 pages)
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17.2
17.2.1
DADR2 and DADR3 are 8-bit readable/writable registers that store the data to be converted.
When analog output is enabled, the values in DADR2 and DADR3 are constantly converted and
output at the analog output pins.
The D/A data registers are initialized to H'00 by a reset and in hardware standby mode.
17.2.2
DACR23 is an 8-bit readable/writable register that controls the operation of the D/A converter.
DACR23 is initialized to H'1F by a reset and in hardware standby mode.
Bit 7—D/A Output Enable 1 (DAOE1): Controls D/A conversion and analog output.
Bit 7
DAOE1
0
1
Bit 6—D/A Output Enable 0 (DAOE0): Controls D/A conversion and analog output.
Bit 6
DAOE0
0
1
606
Bit
Initial value :
R/W
Bit
Initial value :
R/W
Register Descriptions
D/A Data Registers 2 and 3 (DADR2, DADR3)
D/A Control Register 23 (DACR23)
Description
DA3 analog output is disabled
Channel 3 D/A conversion and DA3 analog output are enabled
Description
DA2 analog output is disabled
Channel 2 D/A conversion and DA2 analog output are enabled
:
:
:
:
DAOE1
R/W
R/W
7
0
7
0
DAOE0
R/W
R/W
6
0
6
0
DAE
R/W
R/W
5
0
5
0
R/W
—
—
4
0
4
1
R/W
—
—
3
0
3
1
R/W
—
—
2
0
2
1
R/W
—
—
1
0
1
1
(Initial value)
(Initial value)
R/W
—
—
0
0
0
1
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