STAC9766 datasheet(71/97 Pages) IDT

71 / 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

Note: This register is populated by the BIOS and does not reset on RESET#.

8.4.4.

Function Select (66h Page 01h)

Default: 0000h

Bit(s) Reset Value

Name

Description

15-0

PI15:PVI0

PCI Sub System ID:

This field provides the PCI Sub System ID of the Audio or Modem Sub Assembly

(i.e., CNR Model, Motherboard SKU). This is NOT the CODEC vendor PCI ID, nor

the AC '97 controller PCI ID. Information in this field must be available for AC '97

controller reads when CODEC ready is asserted in AC link.If data is not available,

returns FFFFh.

D15

D14

D13

D12

D11

D10

RESERVED

FC3

FC2

FC1

FC0

T/R

Bit(s) Reset Value

Name

Description

15-5

Reserved Reserved

4-1

00h

FC3:FC0

Function Code bits:

00h - Line Out (Master Out)

01h - Head Phone Out (AUX Out)

Setting the T/R bit to 0 = Left,1 = Right

02h - DAC 3 (C/LFE) - Not Supported

03h - SPDIF out

04h - Phone In

05h - Mic1 (Mic select = 0)

06h - Mic2 (Mic select = 1)

07h - Line In

08h - CD In

09h - Video In

0Ah - Aux In

0Bh - Mono Out

0C- 0Fh - Reserved

For supported Jack and Mic Sense Functions, see Table23: page72.

The Function Code Bits are used to read Register 68h (Page 01h) and Register

6Ah (Page 01h).

Mono I/O should report relevant sense and function information on Tip, and report

not supported on Ring.

Setting the function code to unsupported values will return a 0 when accessing the

Information Valid Bit in page 01 register 68h bit 5.

T/R

Tip or Ring selection Bit.This bit sets which jack conductor the sense value is

measured from. Software will program the corresponding the Ring/Tip selector bit

together with the I/O number in bits FC[3:0].

0 - Tip (Left)

1 - Ring (Right)

STAC9766 Datasheet(PDF) 71 Page - Integrated Device Technology

STAC9766 Datasheet(HTML) 71 Page - Integrated Device Technology

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