ALC250 Просмотр технического описания (PDF) - Unspecified

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производитель

ALC250

TWO CHANNEL AC’97 2.3 AUDIO CODEC with EQUALIZER

Unspecified 

ALC250 Data Sheet

6.1.10 MX16 AUX Volume

Default: 8808h

Register 16h controls the auxiliary input volume. Each step in bits 4:0 correspond to 1.5dB in increase/decrease in volume for

the right channel, allowing 32 levels of volume, from 00000 to 11111. Each step in bits 12:8 correspond to 1.5dB in

increase/decrease in volume for the left channel, allowing 32 levels of volume, from 00000 to 11111.

Bit Type

Function

15

14:13

12:8

7:5

4:0

R/W Mute Control 0: Normal 1: Mute (-∞ dB)

Reserved

R/W AUX Left Volume (ALV[4:0]) in 1.5 dB steps

Reserved

R/W AUX Right Volume (ARV[4:0]) in 1.5 dB steps

For ALV/ARV:

00h +12 dB Gain

08h 0dB gain

1Fh -34.5dB Gain

6.1.11 MX18 PCM_OUT Volume

Default: 8808h

Register 18h controls the PCM_OUT output volume. Each step in bits 4:0 correspond to 1.5dB in increase/decrease in volume

for the right channel, allowing 32 levels of volume, from 00000 to 11111. Each step in bits 12:8 correspond to 1.5dB in

increase/decrease in volume for the left channel, allowing 32 levels of volume, from 00000 to 11111.

Bit Type

Function

15

R/W Mute Control 0: Normal 1: Mute (-∞ dB)

14:13

Reserved

12:8 R/W PCM Volume (PLV[4:0]) in 1.5 dB steps

7:5

Reserved

4:0

R/W PCM Right Volume (PRV[4:0]) in 1.5 dB steps

For PLV/PRV:

00h +12 dB Gain

08h 0dB gain

1Fh -34.5dB Gain

6.1.12 MX1A Record Select

Default: 0000h

Register 1Ah controls the record input volume. Each step in bits 2:0 correspond to 1.5dB in increase/decrease in volume for the

right channel, allowing 7 levels of volume, from 000 to 111. Each step in bits 10:8 correspond to 1.5dB in increase/decrease in

volume for the left channel, allowing 7 levels of volume, from 000 to 111.

Bit Type

Function

15:11

10:8

7:3

2:0

Reserved

R/W Left Record Source Select (LRS[2:0])

Reserved

R/W Right Record Source Select (RRS[2:0])

For LRS

0

1

2

3

4

5

6

7

MIC

CD LEFT

Muted

AUX LEFT

LINE LEFT

STEREO MIXER OUTPUT LEFT

MONO MIXER OUTPUT

PHONE

For RRS

Two Channel AC’97 2.3 Audio Codec

11

Tel: +49(0)234-9351135 · Fax: +49(0)234-9351137 E-MAIL: info@cornelius-consult.de

Rev1.01

http://www.cornelius-consult.de

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