AD1881 查看數據表（PDF） - Analog Devices

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AD1881

AC'97 SoundMAX® Codec

Analog Devices 

RNRLOGDEVICES fRX-ON-DEMRND HOTLINE - Page 21

AD1881

Reset (Index OOh)

Reg

Nmn

Name

OOh Reset

015 014 013 D12 Dll 010 09 D8 D7 D6 D5 04 03 D2 Dl DO Detauh

X SE4 sm sm SEl SEO 1D9 IDS 1D7 1D6 IDS 1D4 103 1D2 IDI IDa 040Oh

Note: Writing any value to this register performs a register reset, which causes all registers to revert to their default values (except

74h, which forces the serial configuration). Reading this register returns the ID code of the part and a code for the type of 3D Stereo

Enhancement.

ID[9:0] Identify Capability. The ID decodes the capabilities of ADlSSI based on the following:

= I Bit 1

Function

I ADl881 *

100

Dedicated MIC PCM In Channel

0

IDI

Modem line Codec Support

0

OBSOLETE ID2

Bass and Treble Control

0

ID3

Simulated Stereo (Mono to Stereo)

0

ID4

Headphone Out Support

1

ID5

Loudness (Bass Boost) Support

0

ID6

IS-Bit DAC Resolution

0

ID7

20-Bit DAC Resolution

0

IDS

IS-Bit ADC Resolution

0

ID9

20-Bit ADC Resolution

0

'1l1e AD1881 contains none of the option...t features identified by these bits.

SE[4:0] Stereo Enhancement. The 3D stereo enhancement identifies the Analog Devices 3D stereo enhancement.

Master Volume Registers (Index 02h)

Reg

Num

OZh

Name

Master

Volume

DlS 014 013 OlZ 011 010 09 08 07 06 OS 04 03 OZ 01 00 Oetaul1:

MM X

LMVS LMV4 LMV3 LMVZ LMVI LMVO X

X

RMVS RMV4 RMV3 RMVZ RMVI RMVO 8000h

RMV[5:0]

Right Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from

0 dB to a maximum attenuation of -94.5 dB.

IMV[5:0]

MM

Left Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from

0 dB to a maximum attenuation of -94.5 dB.

Master Volume Mute. When this bit is set to "1," the channel is muted.

MM

. . . xMV5

xMVO

Function

0

00 0000

0

01 1111

0

11 1111

1

xx XXXX

0 dB Attenuation

-46.5 dB Attenuation

-94.5 dB Attenuation

-CO dB Attenuation

Master Volume Mono (Index 06h)

Reg

Num

Name

OlS 014 013 01Z 011 010 09 08 07 06 OS 04

03

OZ

01

DO

Default

06h

Master

MODO

VoIUtne

MMMX

X X X X X X X X X MMV4 MMV3 MMVZ MMVI MMVO 8000h

MMV[4:0]

MMM

Mono Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from

0 dB to a maximum attenuation of -46.5 dB.

Mono Master Volume Mute. When this bit is set to "1," the channel is muted.

-12-

REV. 0

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