ALC202 Просмотр технического описания (PDF) - Realtek Semiconductor

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ALC202

TWO CHANNEL AC97 AUDIO CODEC

Realtek Semiconductor 

ALC202/ALC202A

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

12:10

9

8

7

6:0

Type

R/W

R/W

R/W

R/W

Reserved, Read as 0

3D Control: 1: On 0: Off

Reserved, Read as 0

Mono Output Select: 1: MIC 0: MIX

MIC Select: 1: MIC 2 0: MIC 1

AD to DA Loop-back Control: 1: Enable

Reserved

Function

0: Disable

6.1.16 MX22 3D Control

Default: 0000h

This register is used to control the 3D stereo enhancement function built into the AC’97 component. The register bits, DP2-DP0

are used to control the separation ratios in the 3D control for both LINE_OUT and DAC_OUT.

The 3D stereo enhancement function provides for a deeper and wider sound experience with a potential 6-speaker arrangement.

Note that the 3D bit in the general purpose register (bit 13) must be set to 1 to enable this function.

Bit Type

15:3

Reserved, Read as 0

2:0

R/W Depth Control (DP[2:0])

3D effect control

DP[2:0] Function DP[2:0]

000

0% (off*)

100

001

12.5%

101

010

25%

110

011

37.5

111

* Default

Function

Function

50%

67.5%

75%

100%

2002/07/30

15

Rev.1.28

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