STAC9271 datasheet(50/223 Pages) IDT

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STAC9271/9272/9273/9274

10-CHANNEL HIGH DEFINITION AUDIO CODEC

PC AUDIO

IDT™

10-CHANNEL HIGH DEFINITION AUDIO CODEC

STAC9271/9272/9273/9274 V 1.0 MARCH2007

IDT CONFIDENTIAL

6.2.22. AFG DACMode

Table 55. AFG Sply

Command Response Format

Bit

Bitfield Name

Reset

Description

[31.:7]

Rsvd

0x0

Reserved

[6.:5]

IBIAS

0x0

00 = Normal Current;

01 = 80% nominal Analog Current;

10 = 120% nominal Analog Current;

11 = 140% nominal Analog Current

[4]

PinLvl

0x1

0= low-level SPDIF Input (special buffer for low

level signals)

1= standard SPDIF Input (for high level signals)

[3.:0]

SplyOvr

0x0

Supply Override Control. See Table below.

[0] = invert ADC supply;

[1] = invert DAC supply;

[2] = supply value;

[3] = supply override enable

Table 56. AFG DACMode

Command Verb Format

Verb ID

Payload

Response

Get

FEB

See bitfield table.

Set1

7EB

See bits [7:0] of bitfield table.

0000_0000h

Table 57. AFG DACMode

Command Response Format

Bit

Bitfield Name

Reset

Description

[31.:7]

Rsvd2

0x0

Reserved

[6]

ADCMixDAC

0x0

Enable mixing of ADC with DAC signal (for karaoke)

[5]

FadeFast

0x0

Gain ramps at the maximum rate

[4]

FadeLog

0x0

Gain ramping is dB linear instead of voltage linear

over time

[3.:0]

Rsvd

0x0

Reserved

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