STAC9766 datasheet(68/97 Pages) IDT

68 / 97 page

STAC9766/9767

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

PC AUDIO

IDT™

STAC9766/9767

V 7.4 12/06

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

8.3.

Extended CODEC Registers Page Structure Definition

Registers 60h-68h are the Extended CODEC Registers: These registers allow for the defi-

nition of further capabilities. These bits provide a paged address space for extended

CODEC information. The Page Selector bits in the Audio Interrupt and Paging register

(Register 24h bits 3:0) control the page of information viewed through this page window.

8.3.1.

Extended Registers Page 00

Page 00 of the Extended CODEC Registers is reserved for vendor specific use. Driver writ-

ers should not access these registers unless the Vendor ID register has been checked first

to ensure that the vendor of the AC '97 component has been identified and the usage of the

vendor defined registers understood.

8.3.2.

Extended Registers Page 01

The usage of Page 01 of the Extended CODEC Registers is defined in Register 24h found

in Section 8.1.17: page 57.

8.3.3.

Extended Registers Page 02, 03

Pages 02 and 03 of the Extended CODEC Registers are reserved for future use.

Read / Write

GI1

When GPIO1 is configured as output and Register h74 bit[0] = 0 (default),

the value of this register will be placed on the GPIO1 pad.

When GPIO1 is configured as output and Register h74 bit[0] = 1, the

GPIO1 pad will get its value from slot12.

When GPIO1 is configured as input and configured as a sticky, writing a

1 does nothing, writing a 0 clears this bit.

When GPIO1 is configured as input, this register reflects the value on the

GPIO1 pad after interpretation of the polarity and sticky configurations.

Read / Write

GI0

When GPIO0 is configured as output and Register h74 bit[0] = 0 (default),

the value of this register will be placed on the GPIO0 pad.

When GPIO0 is configured as output and Register h74 bit[0] = 1, the

GPIO0 pad will get its value from slot12.

When GPIO0 is configured as input and configured as a sticky, writing a

1 does nothing, writing a 0 clears this bit.

When GPIO0 is configured as input, this register reflects the value on the

GPIO0 pad after interpretation of the polarity and sticky configurations.

Bit(s)

Access

Reset

Value

Name

Description

STAC9766 Datasheet(PDF) 68 Page - Integrated Device Technology

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