AD1985

Rev. A | Page 45 of 48

Sense Register (Index 0x6A, Page 01)

Reg Num

Name

D15 D14 D13 D12 D11 D10 D9 D8 D7

D6

D5

D4

D3

D2

D1

D0

Default

0x6A

Sense Register ST2

ST1

ST0

S4

S3

S2

S1

S0

OR1 OR0 SR5 SR4 SR3 SR2 SR1 SR0 N/A

New register added for AC ’97 2.3.

ST[2:0]

Connector/Jack Location Bits. (Read/write.) This field describes the location of the jack in the system. This field is updated by the

BIOS.

0x0: Rear I/O Panel.

0x1: Front Panel.

0x2: Motherboard.

0x3: Dock/External.

0x4 to 0x6: Reserved.

0x7: No Connection/Unused I/O.

S[4:0]

Sensed Bits Relate to the I/O Being Sensed as Input or Output. (Read-only.)

Sensed Bits (When Output Sense Cycle Initiated).

This field allows for the reporting of the type of output peripheral/device plugged in the jack. Values specified below should be

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

0x00: Data Not Valid. Indicates that the reported value(s) is invalid.

0x01: No Connection. Indicates that there are no connected devices. Default.

0x02: Fingerprint. Indicates a specific fingerprint value for devices that are not specified or are unknown.

0x03: Speakers (8 Ω).

0x04: Speakers (4 Ω).

0x05: Powered Speakers.

0x06: Stereo Headphone.

0x07: SPDIF Out (Electrical).

0x08: SPDIF Out (TOS).

0x09: Mono Headset. (Mono speaker left channel and MIC. Read Functions 5 and 6 for matching microphone.) (Not supported.)

0x0A: 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.

0x0B to 0x0E: Reserved.

0x0F: Unknown (Use Fingerprint).

Sensed Bits (When Input Sense Cycle Initiated)

This field allows for the reporting of the type of input peripheral/device plugged in the jack. Values specified below should be

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

0x10: Data Not Valid. Indicates that the reported value(s) is invalid.

0x11: No Connection. Indicates that there are no connected devices. Default.

0x12: Fingerprint. Indicates a specific fingerprint value for devices that are not specified.

0x13: Microphone (Mono).

0x14: Stereo Microphone.

0x15: Stereo Line In (CE Device Attached).

0x16: Mono Line In (CE Device Attached) .

0x17: SPDIF In (Electrical).

0x18: SPDIF In (TOS).

0x19: Headset. (Mono speaker left channel and MIC. Read Functions 0 to 3 for matching DAC out.)

0x1A: Other. Allows a vendor to report sensing other types of devices/peripherals. SR[5:0] together with OR[1:0] provide

information regarding the type of device sensed.

0x1B to 0x1E: Reserved.

0x1F: Unknown (Use Fingerprint).