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REV. 0
AD1981BL
–9–
Indexed Control Registers
Reg
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
00h
Reset
X
SE4
SE3
SE2
SE1
SE0
ID9
ID8
ID7
ID6
ID5
ID4
ID3
ID2
ID1
ID0
0090h
02h
Master Volume
MM
X
X
LMV4
LMV3
LMV2
LMV1 LMV0 RM
*
X
X
RMV4 RMV3 RMV2 RMV1 RMV0
8000h
04h
Headphones
Volume
HPM
X
X
LHV4
LHV3
LHV2
LHV1 LHV0 RM
*
X
X
RHV4 RHV3 RHV2 RHV1 RHV0
8000h
06h
Mono Volume
MVM
X
X
X
X
X
X
X
X
X
X
MV4
MV3
MV2
MV1
MV0
8000h
0Ch
Phone Volume
PHM
X
X
X
X
X
X
X
X
X
X
PHV4 PHV3 PHV2 PHV1 PHV0
8008h
0Eh
MIC Volume
MCM
X
X
X
X
X
X
X
X
M20
X
MCV4 MCV3 MCV2 MCV1 MCV0
8008h
10h
Line-In Volume
LVM
X
X
LLV4
LLV3
LLV2
LLV1
LLV0
RM
*
X
X
RLV4
RLV3
RLV2
RLV1
RLV0
8808h
12h
CD Volume
CVM
X
X
LCV4
LCV3
LCV2
LCV1 LCV0 RM
*
X
X
RCV4 RCV3 RCV2 RCV1 RCV0
8808h
16h
AUX Volume
AM
X
X
LAV4
LAV3
LAV2
LAV1
LAV0
RM
*
X
X
RAV4
RAV3
RAV2
RAV1
RAV0
8808h
18h
PCM-Out Vol
OM
X
X
LOV4
LOV3
LOV2
LOV1 LOV0 RM
*
X
X
ROV4 ROV3 ROV2 ROV1 ROV0
8808h
1Ah
Record Select
X
X
X
X
X
LS2
LS1
LS0
X
X
X
X
X
RS2
RS1
RS0
0000h
1Ch
Record Gain
IM
X
X
X
LIM3
LIM2
LIM1
LIM0
RM
*
X
X
X
RIM3
RIM2
RIM1
RIM0
8000h
20h
General-Purpose
X
X
X
X
X
X
MIX
MS
LPBK X
X
X
X
X
X
X
0000h
26h
Power-Down
Ctrl/Stat
EAPD
PR6
PR5
PR4
PR3
PR2
PR1
PR0
X
X
X
X
REF
ANL
DAC
ADC
000Xh
28h
Ext’d Audio ID
IDC1
IDC0
X
X
REVC1 REVC0 AMAP X
X
X
DSA1
DSA0
X
SPDIF X
VRAS
X605h
2Ah
Ext’d Audio Stat/ VFORCE X
Ctrl
X
X
X
SPCV
X
X
X
X
SPSA1 SPSA0 X
SPDIF X
VRA
0000h
2Ch
PCM Front
DAC Rate
SRF15
SRF14
SRF13
SRF12
SRF11
SRF10
SRF9
SRF8
SRF7
SRF6
SRF5
SRF4
SRF3
SRF2
SRF1
SRF0
BB80h
32h
PCM L/R
ADC Rate
SRA15
SRA14
SRA13
SRA12
SRA11
SRA10
SRA9
SRA8
SRA7
SRA6
SRA5
SRA4
SRA3
SRA2
SRA1
SRA0
BB80h
3Ah
SPDIF Control
V
X
SPSR1
SPSR0
L
CC6
CC5
CC4
CC3
CC2
CC1
CC0
PRE
COPY /AUD
PRO
2000h
60h
EQ CTRL
EQM
MAD
LBEN
X
X
X
X
X
X
SYM
CHS
BCA5 BCA4 BCA3 BCA2 BCA1 BCA0
8080h
62h
EQ DATA
CFD15
CFD14 CFD13
CFD12 CFD11 CFD10 CFD9 CFD8 CFD7 CFD6
CFD5 CFD4 CFD3 CFD2 CFD1 CFD0
0000h
64h
Mixer ADC,
Volume
MXM
X
X
X
LMG3
LMG2
LMG1 LMG0 RM
*
X
X
X
RMG3 RMG2 RMG1 RMG0
8000h
72h
Jack Sense
X
X
X
JS
MT2
JS
MT1
JS
MT0
JS1
EQB
JS0
EQB
JS1
TMR
JS0
TMR
JS1
MD
JS0
MD
JS1
ST
JS0
ST
JS1
INT
JS0
INT
0000h
74h
Serial
Configuration
SLOT
16
REGM REGM
2
REGM X
0
X
X
CHEN X
X
X
INTS
X
SPAL
SPDZ SPLNK 7001h
1
76h
Misc Control
Bits
DACZ
X
M
SPLT
LODIS DAM
X
FMXE X
MAD
PD
2CMIC X
MAD
ST
VREF VREF MBG1 MBG0
H
D
0000h
7Ch
Vendor ID1
F7
F6
F5
F4
F3
F2
F1
F0
S7
S6
S5
S4
S3
S2
S1
S0
4144h
7Eh
Vendor ID2
T7
T6
T5
T4
T3
T2
T1
T0
REV7
REV6
REV5
REV4
REV3
REV2
REV1
REV0
5374h
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 available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right
channels. If MSPLT is not set, RM bit has no effect.