AK2330 Datasheet, PDF (13/16 Pages) Asahi Kasei Microsystems – DAC Type 8-bit 8-channel Electronic Volume

[AK2330]
2.2) VREF registers 0 and 1
Address
A3 A2 A1 A0
D7
1
0
0
0
DA3REF1
1
0
0
1
DA7REF1
Initial value
0
D6
DA3REF0
DA7REF0
0
D5
DA2REF1
DA6REF1
0
Data
D4
D3
DA2REF0 DA1REF1
DA6REF0 DA5REF1
0
0
D2
DA1REF0
DA5REF0
0
D1
DA0REF1
DA4REF1
0
D0
DA0REF0
DA4REF0
0
DA7REF1
to
DA0REF1
0
0
1
1
DA7REF0
to
DA0REF0
0
1
0
1
DAC reference voltage
VSS (internal)
AVDD (internal)
AVDD/2 (internal)
VREF (external)
Remarks
2.3) AVDD/2 register
Address
A3 A2 A1 A0
1
0
1
0
Initial value
D7
AVDD2O7
0
D6
AVDD2O6
0
D5
AVDD2O5
0
Data
D4
D3
AVDD2O4 AVDD2O3
0
0
D2
AVDD2O2
0
D1
AVDD2O1
0
D0
AVDD2O0
0
Data
Item
Function
0
1
Remarks
AVDD2O7 Internal AVDD/2
to
AVDD2O0 output
DAC output
Bypasses the DAC and
outputs the AVDD/2 level
through buffer.
Note Internal generated AVDD/2 level can be output to VOUT0 to VOUT7 pins by setting this register.
2.4) BUFON register
Address
A3 A2 A1 A0
1
0
1
1
Initial value
D7
BUFON7
0
D6
BUFON6
0
D5
BUFON5
0
Data
D4
D3
BUFON4 BUFON3
0
0
D2
BUFON2
0
D1
BUFON1
0
D0
BUFON0
0
Data
Item
BUFON7
to
BUFON0
DAC buffer
operation
Function
0
Powers down buffer and
outputs Hi-Z.
1
Buffer output
Remarks
2.5) Software reset register
Address
Data
A3 A2 A1 A0
D7
D6
D5
D4
D3
D2
1
1
0
0
SRST[7:0]
Initial value
0
0
0
0
0
0
When the SRST[7:0] register is set to 0xAA (10101010), a software reset is performed.
This setting initializes all registers.
Upon completion of a software reset, the register is set to 0.
MS0661-E-00
- 13 -
D1
D0
0
0
2007/08