STAC9752 datasheet(69/95 Pages) IDT

69 / 95 page

STAC9752/9753

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

IDT™

STAC9752/9753

REV 3.3 1206

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

8.4.

STAC9752/9753 Paging Registers

The AC’97 Specification Rev 2.3 uses a paging mechanism in order to increase the number of regis-

ters. The registers currently used in the paging are 60h to 6Eh. For additional information about the

Extended CODEC Registers, please refer to Section 8.3: page68.

One of two pages can be made active at any time, set in Register 24h. Register 24h is the Audio

Interrupt and Paging Register. Additional details about Register 24h is located in Section 8.1.17:

page57.

If page 00h is active, registers 60h to 6Eh are Vendor Specific.

If page 01h is active, registers 60h to 6Eh have the following functionality:

8.4.1.

CODEC Class/Rev (60h Page 01h)

Default: 12xxh

Reg

NAME

FUNCTION

Location

60h CODEC Class/Revision

Provides the CODEC Class and a Vendor specified revision

identifier.

8.4.1: page69

62h PCI SVID

Allows for population by the system BIOS to identify the PCI

Sub System Vendor ID.

8.4.2: page70

64h PCI SSID

Allows for population by the system BIOS to identify the PCI

Sub System ID.

Note:: page70

66h Function Select

Provides the type of audio function being selected and which

jack conductor the selected value is measured from.

Note:: page70

68h Function Information

Includes information about Gain, Inversion, Buffer delays,

Information Validity, and Function Information presence.

8.4.5: page72

6Ah Sense Register

Includes information about the connector/jack location, Input

verses Output sensing, the order of the sense results, and

the IDT specific sense results.

8.4.7: page74

6Ch

Reserved

6Eh

Reserved

D15

D14

D13

D12

D11

D10

RESERVED

CL4

CL3

CL2

CL1

CL0

RV7

RV6

RV5

RV4

RV3

RV2

RV1

RV0

Bit(s) Reset Value

Name

Description

15-13

Reserved Reserved-not defined

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