STAC9752 Datasheet, PDF (69/95 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

STAC9752/9753
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:
Reg
NAME
FUNCTION
60h
CODEC Class/Revision
Provides the CODEC Class and a Vendor specified revision
identifier.
62h PCI SVID
Allows for population by the system BIOS to identify the PCI
Sub System Vendor ID.
64h PCI SSID
Allows for population by the system BIOS to identify the PCI
Sub System ID.
66h Function Select
Provides the type of audio function being selected and which
jack conductor the selected value is measured from.
68h Function Information
Includes information about Gain, Inversion, Buffer delays,
Information Validity, and Function Information presence.
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.
6Ch
Reserved
6Eh
Reserved
Location
8.4.1: page69
8.4.2: page70
Note:: page70
Note:: page70
8.4.5: page72
8.4.7: page74
8.4.1.
CODEC Class/Rev (60h Page 01h)
Register 24h must be set to Page 01h to access this register.
Default: 12xxh
D15
D14
D13
D12
D11
D10
D9
D8
RESERVED
CL4
CL3
CL2
CL1
CL0
D7
D6
D5
D4
D3
D2
D1
D0
RV7
RV6
RV5
RV4
RV3
RV2
RV1
RV0
Bit(s) Reset Value Name
15-13
Reserved Reserved-not defined
Description
IDT™
69
STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
REV 3.3 1206