AD1881 查看數據表（PDF） - Analog Devices

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AD1881

AC'97 SoundMAX® Codec

Analog Devices 

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AD1881

Record Select Control Register (Index lAb)

Reg NaJDe

Num

015 014 013 012 011 010 09

08

07 06 05 04

03

02

01

DO

Default;

IAh Record Select X

X

X

X

X

LS2 LSI LSO X X X X

X

RS2 RSI RSO OOOOh

RS[2:0]

Right Record Select

LS[2:0]

Left Record Select.

Used to select the record source independently for right and left. See table for legend.

The default value is OOOOhw, hich corresponds to MIC in.

RS2. .. RSO

RightRecord Source

OBSOLETE 0

MIC

1

CD_R

2

VIDEO_R

3

AlDCR

4

llNE_IN_R

5

Stereo Mix (R)

6

Mono Mix

7

PHONE_IN

LS2. .. LSO

0

1

2

3

4

5

6

Left RecordSource

MlC

CD_L

VIDEO_L

AUX_L

llNE_IN_L

Stereo Mix (1.)

Mono Mix

7

PHONE_IN

Record Gain (Index ICh)

Reg

Nmn

Name

lCh Record Gain

015 014 013 012 011 010 09 08 07 06 05 04

1M X X X

LIM3 LIM2 LIMI LIMO X X X X

03 02 01 00

efault

RIM3 RIM2 RIMI RIMO 8000h

RlM[3:0]

llM[3:0]

1M

Right Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB and the range is OdB to +22.5 dB.

Left Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB and the range is 0 dB to +22.5 dB.

Input Mute.

0 = Unmuted,

= 1 Muted or -00 dB gain.

1M

. . . xIM3

xIMO

Function

0

II II

0 0000

I xxxxx

+22.5 dB Gain

0 dB Gain

-00 dB Gain

REV. 0

-15-

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