STAC9767 datasheet(79/97 Pages) IDT

79 / 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

8.4.12.

High Pass Filter Bypass (78h*)

To unlock portion of Register 78h, write 0xABBA to Register 76h.

Default: 0000h

8.4.13.

Stereo Mic Enable Register (78h*)

To unlock portion of Register 78h, write 0x7272 to Register 72h.

Default: 0000h

8.5.

Vendor ID1 and ID2 (Index 7Ch and 7Eh)

These two registers contain four 8-bit ID codes. The first three codes have been assigned by

Microsoft using their Plug and Play Vendor ID methodology. The fourth code is a IDT, Inc. assigned

code identifying the STAC9766/9767. The ID1 register (index 7Ch) contains the value 8384h, which

is the first (83h) and second (84h) bytes of the Microsoft ID code. The ID2 register (index 7Eh) con-

tains the value 7666h, which is the third (76h) byte of the Microsoft ID code, and 66h which is the

STAC9766/9767 ID code.

D15

D14

D13

D12

D11

D10

RESERVED

ADC HPF BYP

Bit(s) Reset Value

Name

Description

15:1

RESERVED

Bits not used, should read back 0

ADC HPF BYP

0 = Normal operation, (ADC High Pass Filter active)

1 = ADC High Pass Filter Bypass

D15

D14

D13

D12

D11

D10

RESERVED

RSVD

STEREO_

MIC

RESERVED

Bit(s) Reset Value

Name

Description

15:7

RESERVED

Bits not used, should read back 0

STEREO_MIC

0 = Stereo Mic Disabled (default)

1 = Stereo Mic Enabled

STAC9767 Datasheet(PDF) 79 Page - Integrated Device Technology

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