AD1986A Analog Devices, AD1986A Datasheet - Page 42

• Manufacturer Part Number: AD1986A
• Description: HD Audio SoundMAX Codec
• Manufacturer: Analog Devices

www.DataSheet4U.com
DataSheet U .com
AD1986A
Register
INTS
(Interrupt
Mode
Select)
LBKS [1:0]
Loop-Back
Selection
SPOVR
(S/PDIF
Enable
Override)
OMS [2:0]
Optional
Microphone
Selector
REGM [3:0]
SLOT 16
x
4
This bit selects the audio interrupt implementation path. Note that this bit does not generate an interrupt, rather it steers the
path of the generated interrupt.
Function
INTS
0
1
These bits select the internal digital loop-back path when LPBK bit is active (see Register 0x20).
LBKS [1:0]
00
01
10
11
Use this bit to enable S/PDIF operation even if the external S/PDIF detection resistor is not installed.
SPOVR
0
1
Selects the source of the microphone gain boost amplifiers. These bits work in conjuction with the 2CMIC (0x76, D06),
MS (0x20 D08), and MMIX (0x7A D08) bits.
OMS [2:0]
000
001
01x
100
101
110
111
Bit mask indicating which codec is being accessed in a chained codec configuration.
REGM0—Master codec register mask
REGM1—Slave 1 codec register mask
REGM2—Slave 2 codec register mask
REGM3—Slave 3 codec register mask
Enable 16-bit slot mode: SLOT16 makes all AC link slots 16 bits in length, formatted into 16 slots. This is a preferred mode for
DSP serial port interfacing.
SLOT 16
0
1
Reserved
Interrupt Mode
Bit 0 Slot 12 (modem interrupt)
Slot 6 valid bit (MIC ADC interrupt)
Interrupt Mode
Loop back through the front DACs
Loop back through the surround DACs
Loop back through the center and LFE DACs (center
DAC loops back from the ADC left channel, the LFE
DAC from the ADC right channel)
Reserved
S/PDIF Detection
External resistor determines the presence of
S/PDIF
Enable S/PDIF operation
Left Channel
MIC pins
LINE_IN pins
C/LFE pins
Mix of MIC and C/LFE pins
Mix of MIC and LINE_IN pins
Mix of LINE_IN and C/LFE pins
Mix of MIC, LINE_IN and C/LFE pins
Function
Standard AC ’97 operation
All ac link S slots are 16 bits
Rev. 0 | Page 42 of 56
Default: 0
Default
Default
Default
Default
Default
Default
Default