AD1986ABSTZ datasheet(48/56 Pages) AD

48 / 56 page

AD1986A

Rev. 0 | Page 48 of 56

PCI SUBSYSTEM VENDOR ID REGISTER (REGISTER 0x62, PAGE 01)

This register is only reset by power-on. It is used by the BIOS to store configuration information (per AC ’97 Revision 2.3 specification)

and must not be reset by soft or hardware resets.

Reg

Name

D15

D14

D13

D12

D11

D10

Default

0x621

PCI

SVID

PVI15

PVI14

PVI13

PVI12

PVI11

PVI10

PVI9

PVI8

PVI7

PVI6

PVI5

PVI4

PVI3

PVI2

PVI1

PVI0

0xFFFF

Table 111.

Function

PVI [15:0]

PCI Sub

System

Vendor ID

Optional per AC ‘97 specifications, should be implemented as read/write on AD1986A.

This field provides the PCI subsystem vendor ID of the audio or modem subassembly vendor (that is, CNR manufacturer,

motherboard vendor). This is not the codec vendor PCI vendor ID or the AC ’97 controller PCI vendor ID. If data is not

available it returns 0xFFFF.

PCI SUBSYSTEM DEVICE ID REGISTER (REGISTER 0x64, PAGE 01)

This register is only reset by power-on. It is used by the BIOS to store configuration information (per AC’97 v2.3 specification) and must

not be reset by soft or hardware resets.

Reg

Name

D15

D14

D13

D12

D11

D10

Default

0x641

PCI SID

PI15

PI14

PI13

PI12

PI11

PI10

PI9

PI8

PI7

PI6

PI5

PI4

PI3

PI2

PI1

PI0

0xFFFF

Table 112.

Function

PI [15:0]

(PCI Vendor

ID)

Optional per AC ‘97 specifications, should be implemented as read/write on the AD1986A. This field provides the PCI

subsystem ID of the audio or modem subassembly (that is, CNR model, motherboard SKU). This is not the codec vendor PCI

ID or the AC ’97 controller PCI ID. Information in this field must be available, because the AC ’97 controller reads when the

codec ready is asserted in the AC link. If data is not available, it should return 0xFFFF.

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