AK2331 Datasheet, PDF (12/17 Pages) Asahi Kasei Microsystems – DAC Type 8-bit 4-channel Electronic Volume

[AK2331]
Register Functions
1) Register configuration
Address
A3 A2 A1 A0
Function
Data
D7
D6
D5
D4
D3
D2
D1
D0
0 0 0 0 VOUT0 register VOUT07 VOUT06 VOUT05 VOUT04 VOUT03 VOUT02 VOUT01 VOUT00
0 0 0 1 VOUT1 register VOUT17 VOUT16 VOUT15 VOUT14 VOUT13 VOUT12 VOUT11 VOUT10
0 0 1 0 VOUT2 register VOUT27 VOUT26 VOUT25 VOUT24 VOUT23 VOUT22 VOUT21 VOUT20
0 0 1 1 VOUT3 register VOUT37 VOUT36 VOUT35 VOUT34 VOUT33 VOUT32 VOUT31 VOUT30
0 1 0 0 Not used
−
−
−
−
−
−
−
−
0 1 0 1 Not used
−
−
−
−
−
−
−
−
0 1 1 0 Not used
−
−
−
−
−
−
−
−
0 1 1 1 Not used
−
−
−
−
−
−
−
−
1 0 0 0 VREF register
DA3REF1 DA3REF0 DA2REF1 DA2REF0 DA1REF1 DA1REF0 DA0REF1 DA0REF0
1 0 0 1 Not used
−
−
−
−
−
−
−
−
1 0 1 0 AVDD/2 register
−
−
−
−
AVDD2O3 AVDD2O2 AVDD2O1 AVDD2O0
1 0 1 1 BUFON register
−
−
−
−
BUFON3 BUFON2 BUFON1 BUFON0
1 1 0 0 Software reset
SRST[7:0]
VOUT0 to
1 1 0 1 VOUT3
－
－
－
－
CTRL3 CTRL2 CTRL1 CTRL0
Output control
1 1 1 0 Not used
−
−
−
−
−
−
−
−
1 1 1 1 Not used
−
−
−
−
−
−
−
−
Note An access to data indicated by "-" does not have any effect on the LSI operation.
2) Descriptions of registers
2.1) VOUT register
Address
A3 A2 A1 A0
D7
0
0
0
0
VOUT07
↓
↓
↓
↓
↓
0
0
1
1
VOUT37
Initial value
0
D6
VOUT06
↓
VOUT36
0
D5
VOUT05
↓
VOUT35
0
Data
D4
D3
VOUT04 VOUT03
↓
↓
VOUT34 VOUT33
0
0
D2
VOUT02
↓
VOUT32
0
D1
VOUT01
↓
VOUT31
0
D0
VOUT00
↓
VOUT30
0
D7 D6 D5 D4 D3 D2 D1 D0
VOUT0 to VOUT3 output
0
0
0
0
0
0
0
0 VOUT = (VIN - VREF) • 0/256 + VREF
0
0
0
0
0
0
0
1 VOUT = (VIN - VREF) • 1/256 + VREF
0
0
0
0
0
0
1
0 VOUT = (VIN - VREF) • 2/256 + VREF
0
0
0
0
0
0
1
1 VOUT = (VIN - VREF) • 3/256 + VREF
↓
↓
↓
↓
↓
↓
↓
↓
↓
1
1
1
1
1
1
1
0 VOUT = (VIN - VREF) • 254/256 + VREF
1
1
1
1
1
1
1
1 VOUT = (VIN - VREF) • 255/256 + VREF
MS0903-E-00
- 12 -
2008/03