STAC9227 datasheet(52/237 Pages) IDT

52 / 237 page

STAC9227/9228/9229/9230

8-CHANNEL HIGH DEFINITION AUDIO CODEC

PC AUDIO

IDT™

8-CHANNEL HIGH DEFINITION AUDIO CODEC

STAC9227/9228/9229/9230V 1.0 MARCH 2007

IDT CONFIDENTIAL

6.2.22. AFG DACMode

6.2.23. AFG GPIOPlrty

[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 55. 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 56. 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

Table 57. AFG GPIOPlrty

Command Verb Format

Verb ID

Payload

Response

Get

FEE

See bitfield table.

Set1

7EE

See bits [7:0] of bitfield table.

0000_0000h

Table 54. AFG Sply

Command Response Format

Bit

Bitfield Name

Reset

Description

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