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

*

XX

RMV4 RMV3 RMV2 RMV1 RMV0

8000h

04h

Headphones

HPM

X

X

LHV4

LHV3

LHV2

LHV1 LHV0 RM

*

XX

RHV4 RHV3 RHV2 RHV1 RHV0

8000h

Volume

06h

Mono Volume

MVM

X

X

XXX

XXXX

XMV4

MV3

MV2

MV1

MV0

8000h

0Ch

Phone Volume

PHM

X

X

XXX

XXXX

X

PHV4 PHV3 PHV2 PHV1 PHV0

8008h

0Eh

MIC Volume

MCM

X

X

XXX

XXXM20

X

MCV4 MCV3 MCV2 MCV1 MCV0

8008h

10h

Line-In Volume

LVM

X

X

LLV4

LLV3

LLV2

LLV1

LLV0

RM

*

XX

RLV4

RLV3

RLV2

RLV1

RLV0

8808h

12h

CD Volume

CVM

X

X

LCV4

LCV3

LCV2

LCV1 LCV0 RM

*

XX

RCV4 RCV3 RCV2 RCV1 RCV0

8808h

16h

AUX Volume

AM

X

X

LAV4

LAV3

LAV2

LAV1

LAV0

RM

*

XX

RAV4 RAV3 RAV2 RAV1 RAV0

8808h

18h

PCM-Out Vol

OM

X

X

LOV4

LOV3

LOV2

LOV1 LOV0 RM

*

XX

ROV4 ROV3 ROV2 ROV1 ROV0

8808h

1Ah

Record Select

X

X

X

X

X

LS2

LS1

LS0

X

X

XXX

RS2

RS1

RS0

0000h

1Ch

Record Gain

IM

X

X

X

LIM3

LIM2

LIM1

LIM0

RM

*

X

XX

RIM3

RIM2

RIM1

RIM0

8000h

20h

General-Purpose

X

X

X

XXX

MIX

MS

LPBK X

XXXXXX

0000h

26h

Power-Down

EAPD

PR6

PR5

PR4

PR3

PR2

PR1

PR0

X

X

X

X

REF

ANL

DAC

ADC

000Xh

Ctrl/Stat

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

X

X

X

SPCV

XXXX

SPSA1 SPSA0 X

SPDIF X

VRA

0000h

Ctrl

2Ch

PCM Front

SRF15

SRF14

SRF13

SRF12

SRF11

SRF10

SRF9

SRF8

SRF7

SRF6

SRF5

SRF4

SRF3

SRF2

SRF1

SRF0

BB80h

DAC Rate

32h

PCM L/R

SRA15

SRA14

SRA13

SRA12

SRA11

SRA10

SRA9

SRA8

SRA7

SRA6

SRA5

SRA4

SRA3

SRA2

SRA1

SRA0

BB80h

ADC Rate

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

X

X

X

X

X

X

SYM

CHS

BCA5 BCA4 BCA3 BCA2 BCA1 BCA0

8080h

LBEN

62h

EQ DATA

CFD15

CFD14 CFD13

CFD12 CFD11 CFD10 CFD9 CFD8 CFD7 CFD6

CFD5 CFD4 CFD3 CFD2 CFD1 CFD0

0000h

64h

Mixer ADC,

MXM

X

X

X

LMG3

LMG2

LMG1 LMG0 RM

*

X

XX

RMG3 RMG2 RMG1 RMG0

8000h

Volume

72h

Jack Sense

X

X

X

JS

JS

JS

JS1

JS0

JS1

JS0

JS1

JS0

JS1

JS0

JS1

JS0

0000h

MT2

MT1

MT0

EQB

EQB

TMR

TMR

MD

MD

ST

ST

INT

INT

74h

Serial

SLOT

REGM REGM

REGM X

X

X

CHEN X

X

X

INTS

X

SPAL

SPDZ SPLNK 7001h

Configuration

16

2

1

0

76h

Misc Control

DACZ

X

M

LODIS DAM

X

FMXE X

MAD

2CMIC X

MAD

VREF VREF MBG1 MBG0

0000h

Bits

SPLT

PD

ST

H

D

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.