STAC9766 datasheet(75/97 Pages) IDT

75 / 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

Bit(s) Reset Value

Name

Description

15-13

ST2:ST0

Connector/Jack location bits

This field describes the location of the jack in the system.

0h - Rear I/O Panel

1h - Front Panel

2h - Motherboard

3h - Dock/External

4h:6h - Reserved

7h - No Connection/unused I/O

These bits are Read/Write.

12-8

S4:S0

Sensed bits meaning relates to the I/O being sense as output or inputs.

Sensed bits (outputs): See Table 27: page75.

This field allows for the reporting of the type of output peripheral/device plugged

in the jack. Values specified below should be interrogated in conjunction with

the SR[5:0] and OR[1:0] bits for accurate reporting.

Sensed bits (inputs): See Table 28: page76.

This field allows for the reporting of the type of input peripheral/device plugged

in the jack. Values specified below should be interrogated in conjunction with

the SR[5:0] and OR[1:0] bits for accurate reporting.

This field is Read Only.

7-6

OR1:0

Order Bits. These bits indicate the order the sense result bits SR[5:0] are using.

00 - 10

0 (i.e., Ohms)

01 - 10

1 (i.e., 10 Ohms)

10 - 102 (i.e., 100 Ohms)

11 - 10

3 (i.e., 1K Ohms)

5-0

SR5:SR0

Sense Result bits

These bits are used to report a vendor specific fingerprint or value. (Resistance,

impedance, reactance, etc.) This field is Read Only.

Table 27. Sensed Bits (Outputs)

Reported Value

Output Peripheral/Device

Data not valid. Indicates that the reported value(s) is invalid.

No connection. Indicates that there are no connected devices.

Fingerprint. Indicates a specific fingerprint value for devices that are not specified or unknown.

Speakers (8 ohms)

Speakers (4 ohms)

Powered Speakers

Stereo Headphone

RESERVED

Headset (mono speaker left channel and mic.)

Other. Allows a vendor to report sensing other type of devices/peripherals. SR[5:0] together with

OR[1:0] provide information regarding the type of device sensed.

Bh-Eh

Reserved

Unknown (use fingerprint)

STAC9766 Datasheet(PDF) 75 Page - Integrated Device Technology

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