STAC9766 Datasheet, PDF (75/97 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
PC AUDIO
Bit(s) Reset Value Name
Description
Connector/Jack location bits
This field describes the location of the jack in the system.
0h - Rear I/O Panel
1h - Front Panel
15-13
ST2:ST0 2h - Motherboard
3h - Dock/External
4h:6h - Reserved
7h - No Connection/unused I/O
These bits are Read/Write.
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
12-8
S4:S0
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.
Order Bits. These bits indicate the order the sense result bits SR[5:0] are using.
00 - 10⁰ (i.e., Ohms)
7-6
OR1:0 01 - 10¹ (i.e., 10 Ohms)
10 - 10² (i.e., 100 Ohms)
11 - 10³ (i.e., 1K Ohms)
Sense Result bits
5-0
SR5:SR0 _{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
0h
Data not valid. Indicates that the reported value(s) is invalid.
1h
No connection. Indicates that there are no connected devices.
2h
Fingerprint. Indicates a specific fingerprint value for devices that are not specified or unknown.
3h
Speakers (8 ohms)
4h
Speakers (4 ohms)
5h
Powered Speakers
6h
Stereo Headphone
7h
RESERVED
8h
RESERVED
9h
Headset (mono speaker left channel and mic.)
Other. Allows a vendor to report sensing other type of devices/peripherals. SR[5:0] together with
Ah
OR[1:0] provide information regarding the type of device sensed.
Bh-Eh
Reserved
Fh
Unknown (use fingerprint)
IDT™
75
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06