AD1986ABSTZ datasheet(42/56 Pages) AD

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AD1986A

Rev. 0 | Page 42 of 56

Function

Default

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.

INTS

Interrupt Mode

Bit 0 Slot 12 (modem interrupt)

Default

INTS

(Interrupt

Mode

Select)

Slot 6 valid bit (MIC ADC interrupt)

These bits select the internal digital loop-back path when LPBK bit is active (see Register 0x20).

LBKS [1:0]

Interrupt Mode

Loop back through the front DACs

Default

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)

LBKS [1:0]

Loop-Back

Selection

Reserved

Use this bit to enable S/PDIF operation even if the external S/PDIF detection resistor is not installed.

SPOVR

S/PDIF Detection

External resistor determines the presence of

S/PDIF

Default

SPOVR

(S/PDIF

Enable

Override)

Enable S/PDIF operation

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]

Left Channel

000

MIC pins

Default

001

LINE_IN pins

01x

C/LFE pins

100

Mix of MIC and C/LFE pins

101

Mix of MIC and LINE_IN pins

110

Mix of LINE_IN and C/LFE pins

OMS [2:0]

Optional

Microphone

Selector

111

Mix of MIC, LINE_IN and C/LFE pins

REGM [3:0]

Bit mask indicating which codec is being accessed in a chained codec configuration.

REGM0—Master codec register mask

Default

REGM1—Slave 1 codec register mask

REGM2—Slave 2 codec register mask

REGM3—Slave 3 codec register mask

SLOT 16

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

Function

Standard AC ’97 operation

Default

All ac link S slots are 16 bits

Reserved

Default: 0

AD1986ABSTZ Datasheet(PDF) 42 Page - Analog Devices

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