STAC9750 datasheet(55/73 Pages) IDT

55 / 73 page

STAC9750/9751

VALUE-LINE TWO-CHANNEL AC’97 CODECS

PC AUDIO

IDT™

STAC9750/9751

V 5.8 103106

VALUE-LINE TWO-CHANNEL AC’97 CODECS

6.5.27.2.

ADC High Pass FIlter Bypass(78h)

Default: 0000h

6.5.28.

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 an IDT assigned

code identifying the STAC9750/9751. The ID1 register (index 7Ch) contains the value 8384h, which

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

contains the value 7650h, which is the third (76h) of the Microsoft ID code, and 50h which is the

STAC9750/9751 ID code.

Note: The lower half of the Vendor ID2 register (index 7Eh) currently contains the value xxh identifying the

STAC9750/9751. This value can be used by the audio driver, or miniport driver in the case of WIN98®,

to adjust software functionality to match the feature-set of the STAC9750/9751. This portion of the

the case of silicon level device modifications. This will allow the software driver to identify any required

operational differences between the existing STAC9750/9751 and any future versions.

6.5.28.1.

Vendor ID1 (7Ch)

Default: 8384h

6.5.28.2.

Vendor ID2 76xx (7Eh)

Default: 7650h

D15

D14

D13

D12

D11

D10

Reserved

ADC HPF BYP

D15

D14

D13

D12

D11

D10

000

001

D15

D14

D13

D12

D11

D10

101

100

STAC9750 Datasheet(PDF) 55 Page - Integrated Device Technology

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