AD1985 Analog Devices, AD1985 Datasheet - Page 45

• Manufacturer Part Number: AD1985
• Description: AC'97 2.3 Soundmax Codec W/jack Sensing
• Manufacturer: Analog Devices

Sense Register (Index 0x6A, Page 01)
Reg Num
0x6A
New register added for AC ’97 2.3.
ST[2:0]
S[4:0]
OR[1:0]
SR[5:0]
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.
0x4–0x6: Reserved.
0x7: No Connection/unused I/O.
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–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–0x1E: Reserved.
0x1F: Unknown (use fingerprint).
Order Bits. These bits indicate the order of magnitude that the sense result Bits SR[5:0] are using. Default is 0x0.
00: 10
01: 10
10: 10
11: 10
For example, SR = 1, OR = 11; if measuring resistance, result is 1 kΩ.
Sense Result Bits. (Read-only, default 0.) These bits are used to report a vendor specific fingerprint or value. (Resistance,
impedance, reactance, etc.)
Name
Sense Register
0
1
2
3
D15 D14 D13 D12 D11 D10 D9 D8 D7
ST2
ST1
ST0
S4
S3
Rev. 0 | Page 45 of 48
S2
S1 S0 OR1 OR0 SR5 SR4 SR3 SR2 SR1 SR0 N/A
D6
D5
D4
D3
D2
D1
D0
AD1985
Default