AD1986 Analog Devices, AD1986 Datasheet - Page 44

• Manufacturer Part Number: AD1986
• Manufacturer: Analog Devices

Register
FIP (RO)
(Function
Information
Present)
AD1986
Table 70.
Register
T/R
(FIP or Ring
Selection Bit)
FC [3:0]
Function Code
Bits
x
INFORMATION AND I/O REGISTER (REGISTER 0x68, PAGE 01)
This address represents multiple registers (one for each supported function code (FC [3:0] bits (
reset by power-on. It is used by the BIOS to store configuration information (per AC ’97 Revision 2.3 specifications) and must not be reset
by soft or hardware resets.
Reg
0x681
Table 71.
Name
Information
and I/O
Function
CODEC default. When set to a 1, this bit indicates that the G [4:0], INV, DL [4:0] (in Register 0x681), and ST [2:0] (in
Register 0x6A1) bits are supported and are read/write capable. This bit set to a 0 indicates that the G [4:0], INV, DL [4:0], and
ST [2:0] bits are not supported, and are read-only with a value of 0. Mono inputs and outputs should report the relevant
function and sense information when T/R is set to 0 (tip). The FIP bit should report 0 (Page 0x01, Register 0x68, Bit 0 reports
no function information present) when T/R is set to a 1 on a mono input or output.
FIP
0
1
Function
This bit sets which jack conductor the sense value is measured from. Software will program the corresponding rng/tp
selector bit together with the I/O number in bits FC [3:0]. Once software programs the value and properly reads it back to
confirm selection and implementation, it will access the rest of the bits fields in the descriptor. Mono inputs and outputs
should report the relevant function and sense information when T/R is set to 0 (tip). The FIP bit should report 0 (Page
0x01, Register 0x68, Bit 0 reports no function information present) when T/R is set to a 1 on a mono input or output.
T/R
0
1
These bits specify the type of audio function described by this page. These bits are read/write and represent current
AC ’97 Revision 2.2 defined I/O capabilities. Software will program the corresponding I/O number in this field together
with the tip/ring selector bit T/R. Once software programs the value and properly reads it back to confirm selection and
implementation, it will access the rest of the bits fields in the descriptor.
FC [3:0]
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
0xC
0xD–0xF
Reserved.
D15
G4
Function
Function information not supported
Function information supported
D14
G3
Function
Tip (left channel)
Ring (right channel)
Function
DAC 1 (master out). maps to front DACs (L/R)
DAC 2 (AUX out). maps to surround DACs (L/R)
DAC 3 (C/LFE). maps to C/LFE DACs
S/P-DIF out
Phone in
MIC_1 (Mic select = 0)
MIC_2 (Mic select = 1)
Line in
CD in
Video in
Aux in
Mono out
Headphone ut
Reserved
D13
G2
D12
G1
D11
G0
D10
INV
Rev. 0 | Page 44 of 52
D9
DL4
DL3
D8
D7
DL2
D6
DL1
Preliminary Technical Data
DL0
D5
0x
66 D [04:01])). These values are only
D4
IV
Power-on default
D3
x
Default
Default
Not supported on the AD1986
Default: 0
x
D2
D1
x
D0
FIP
0xxxxx
Default