AD1986BSTZ datasheet(43/52 Pages) AD

43 / 52 page

Preliminary Technical Data

AD1986

Rev. 0 | Page 43 of 52

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 68.

Function

PVI [15:0]

PCI Sub

System

Vendor ID

Optional per AC ‘97 specifications, should be implemented as read/write on AD1986.

This field provides the PCI subsystem vendor ID of the audio or modem subassembly vendor (i.e., 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 should return 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 69.

Function

PI [15:0]

(PCI Vendor

ID)

Optional per AC ‘97 specifications, should be implemented as read/write on the AD1986. This field provides the PCI

subsystem ID of the audio or modem subassembly (i.e., 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 FFFFh.

FUNCTION SELECT REGISTER (REGISTER 0x66, PAGE 01)

This register is used to select which function (analog I/O pins), information and I/O (0x6801), and sense (0x6A01) registers apply to it.

The AD1986 associates FC = 0x0 with surround functions and FC = 0x01 with front functions. These are changed in the AD1986 to align

with the new device pin-out and to separate LINE_OUT functions.

Reg

Name

D15

D14

D13

D12

D11

D10

Default

0x661

Function

Select

FC3

FC2

FC1

FC0

T/R

0x0000

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