ALC250 데이터 시트보기 (PDF) - Unspecified

부품명

상세내역

제조사

ALC250

TWO CHANNEL AC’97 2.3 AUDIO CODEC with EQUALIZER

Unspecified 

0

MIC

1

CD RIGHT

2

Muted

3

AUX RIGHT

4

LINE RIGHT

5

STEREO MIXER OUTPUT RIGHT

6

MONO MIXER OUTPUT

7

PHONE

ALC250 Data Sheet

6.1.13 MX1C Record Gain for Stereo ADC

Default: 8000h

Register 1Ch controls the record gain. Each step in bits 3:0 correspond to 1.5dB in increase/decrease in gain for the right

channel, allowing 16 levels of gain, from 0000 to 1111. Each step in bits 11:8 correspond to 1.5dB in increase/decrease in gain

for the left channel, allowing 16 levels of gain, from 0000 to 1111.

Bit

15

14:12

11:8

7:4

3:0

Type

R/W

R/W

R/W

Function

Mute Control 0: Normal 1: Mute (-∞ dB)

Reserved

Left Record Gain Select (LRG[3:0]) in 1.5 dB steps

Reserved

Right Record Gain Select (RRG[3:0]) in 1.5 dB steps

For LRG/RRG:

0Fh +22.5dB

00h 0 dB (No Gain)

6.1.14 MX1E Record Gain for MIC ADC

Default: 8000h

Register 1Eh controls the record gain. Each step in bits 3:0 correspond to 1.5dB in increase/decrease in gain for the right

channel, allowing 16 levels of gain, from 0000 to 1111. Each step in bits 11:8 correspond to 1.5dB in increase/decrease in gain

for the left channel, allowing 16 levels of gain, from 0000 to 1111.

Bit Type

Function

15

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

14:12

Reserved

11:8 R/W Left Record Gain Select (LMRG[3:0]) in 1.5 dB steps

7:4

Reserved

3:0

R/W Right Record Gain Select (RMRG[3:0]) in 1.5 dB steps

For LRG/RRG:

0Fh +22.5dB

00h 0 dB (No Gain)

6.1.15 MX20 General Purpose Register

Default: 0000h

This register is used to control several functions. Bit 13 enables or disables 3D control. Bit 9 allows selection of mono output.

Bit 8 controls the MIC selector. Bit 7 enables loopback of the AD output to the DA input without involving the AC-Link,

allowing for full system performance measurements.

Bit

15:14

13

12:9

8

7

6:0

Type

R/W

R/W

R/W

Reserved, Read as 0

3D Control 1: On 0: Off

Reserved, Read as 0

MIC Select 0: MIC 1 1: MIC 2

AD to DA Loop-back Control 0: Disable

Reserved

Function

1: Enable

Two Channel AC’97 2.3 Audio Codec

12

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

Rev1.01

http://www.cornelius-consult.de

Share Link: