Audio Codec '97

AC ‘97 Component Specification Revision 2.3 Rev 1.0
68
Bit Default Function
ST[2:0] 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.
S[4:0] 1h Sensed bits relates to the I/O being sensed as either output or inputs.
Sensed bits (outputs).
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.
00h – Data not valid. Indicates that the reported value(s) is invalid.
01h – No connection. Indicates that there are no connected devices.
02h – Fingerprint. Indicates a specific fingerprint value for devices
that are not specified or are unknown.
03h – Speakers (8 ohms)
04h – Speakers (4 ohms)
05h – Powered speakers
06h – Stereo headphone
07h – SPDIF Out (electrical)
08h – SPDIF Out (TOS)
09h – Headset (mono speaker left channel and microphone. Read
Functions 5 and 4 for matching Microphone)
0Ah – 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.
0Bh-0Eh – Reserved
0Fh – Unknown (use fingerprint)
10-1Fh – Reserved
Sensed bits (inputs).
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.
00h – Data not valid. Indicates that the reported value(s) is invalid.
01h – No connection. Indicates that there are no connected devices.
02h – Fingerprint. Indicates a specific fingerprint value for devices
that are not specified.
03h – Microphone (mono)
04h – Stereo Microphone
05h – Stereo Line In (CE device attached)
06h – Mono Line In (CE device attached)