AD1981B Analog Devices, AD1981B Datasheet - Page 9

• Manufacturer Part Number: AD1981B
• Description: AD1981B AC'97 SoundMAX® Codec
• Manufacturer: Analog Devices

NOTES
All registers not shown. Bits containing an X are assumed to be reserved.
Odd register addresses are aliased to the next lower even address.
Reserved registers should not be written.
Zeros should be written to reserved bits.
*For AC ’97 compatibility, Bit D7 (RM) is only available by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right
REV. A
Reg Name
00h
02h
04h
06h
0Ch Phone Volume
0Eh MIC Volume
10h
12h
16h
18h
1Ah Record Select
1Ch Record Gain
20h
26h
28h
2Ah Ext’d Audio Stat/ VFORCE X
2Ch PCM Front
32h
3Ah SPDIF Control
60h
62h
64h
72h
74h
76h
7Ch Vendor ID1
7Eh Vendor ID2
channels. If MSPLT is not set, RM bit has no effect.
Reset
Master Volume
Headphones
Volume
Mono Volume
Line In Volume
CD Volume
AUX Volume
PCM Out Vol
General-Purpose
Power-Down
Ctrl/Stat
Ext’d Audio ID
Ctrl
DAC Rate
PCM L/R
ADC Rate
EQ CTRL
EQ DATA
Mixer ADC,
Volume
Jack Sense
Serial
Configuration
Misc Control
Bits
D15
X
MM
HPM
MVM
PHM
MCM
LVM
CVM
AM
OM
X
IM
X
EAPD
IDC1
SRF15
SRA15
V
EQM
CFD15
MXM
X
SLOT
16
DACZ
F7
T7
D14
SE4
X
X
X
X
X
X
X
X
X
X
X
X
PR6
IDC0
SRF14 SRF13
SRA14 SRA13
X
MAD
LBEN
CFD14 CFD13
X
X
REGM REGM
2
X
F6
T6
D13
SE3
X
X
X
X
X
X
X
X
X
X
X
X
PR5
X
X
SPSR1
X
X
X
1
M
SPLT
F5
T5
SE2
X
X
X
LCV4
LOV4
X
PR4
X
CFD12 CFD11 CFD10 CFD9 CFD8 CFD7 CFD6
X
MT2
REGM X
0
T4
D12
LMV4
LHV4
LLV4
LAV4
X
X
X
SRF12 SRF11 SRF10 SRF9 SRF8 SRF7 SRF6
SRA12 SRA11 SRA10 SRA9 SRA8 SRA7 SRA6
SPSR0 L
X
JS
LODIS DAM
F4
D11
SE1
LMV3
LHV3
X
X
X
LLV3
LCV3
LAV3
LOV3
X
LIM3
X
PR3
REVC1 REVC0 AMAP X
X
X
LMG3 LMG2 LMG1 LMG0 RM*
JS
MT1
F3
T3
Indexed Control Registers
D10
SE0
LMV2
LHV2
X
X
X
LLV2
LCV2
LAV2
LOV2
LS2
LIM2
X
PR2
SPCV
CC6
X
JS
MT0
X
X
F2
T2
ID9
LMV1 LMV0 RM*
LHV1 LHV0 RM*
X
X
X
LCV1 LCV0 RM*
LAV1 LAV0 RM*
LOV1 LOV0 RM*
LS1
LIM1 LIM0 RM*
MIX
PR1
X
X
EQB
X
F1
T1
D9
LLV1 LLV0 RM*
CC5
JS1
FMXE X
–9–
D8
ID8
X
X
X
LS0
MS
PR0
X
CC4
X
JS0
EQB
CHEN X
F0
T0
D7
ID7
X
X
X
X
LPBK X
X
X
X
CC3
SYM
JS1
TMR
MAD 2CMIC X
PD
S7
REV7 REV6
D6
ID6
X
X
X
X
M20
X
X
X
X
X
X
X
X
X
CC2
CHS
X
JS0
TMR
X
S6
ID5
X
DSA1 DSA0 X
SRA5 SRA4 SRA3 SRA2 SRA1 SRA0
MD
X
D5
X
X
X
X
X
X
X
X
X
X
X
X
SPSA1 SPSA0 X
SRF5 SRF4 SRF3 SRF2 SRF1 SRF0
CC1
BCA5 BCA4 BCA3 BCA2 BCA1 BCA0
CFD5 CFD4 CFD3 CFD2 CFD1 CFD0
X
JS1
S5
REV5 REV4 REV3 REV2 REV1 REV0
D4
ID4
RMV4 RMV3 RMV2 RMV1 RMV0 8000h
RHV4 RHV3 RHV2 RHV1 RHV0
MV4
PHV4 PHV3 PHV2 PHV1 PHV0
MCV4 MCV3 MCV2 MCV1 MCV0 8008h
RLV4 RLV3 RLV2 RLV1 RLV0
RCV4 RCV3 RCV2 RCV1 RCV0
RAV4 RAV3 RAV2 RAV1 RAV0
ROV4 ROV3 ROV2 ROV1 ROV0
X
X
X
X
CC0
X
JS0
MD
INTS X
MAD VREF VREF MBG1 MBG0 0000h
ST
S4
D3
ID3
MV2
X
RIM3 RIM2 RIM1 RIM0
X
REF
PRE
RMG3 RMG2 RMG1 RMG0 8000h
JS1
ST
H
S3
D2
ID2
MV2
RS2
X
ANL
SPDF X
SPDIF X
COPY /AUD PRO
JS0
ST
SPAL SPDZ SPLNK 7001h
D
S2
D1
ID1
MV1
RS1
X
DAC
JS1
INT
S1
AD1981B
D0
ID0
MV0
RS0
X
ADC
VRAS
VRA
JS0
INT
S0
Default
0090h
8000h
8000h
8008h
8808h
8808h
8808h
8808h
0000h
8000h
0000h
000Xh
X605h
0000h
BB80h
BB80h
2000h
8080h
0000h
0000h
4144h
5374h