STAC9271 datasheet(181/223 Pages) IDT

181 / 223 page

STAC9271/9272/9273/9274

10-CHANNEL HIGH DEFINITION AUDIO CODEC

PC AUDIO

IDT™

10-CHANNEL HIGH DEFINITION AUDIO CODEC

181

STAC9271/9272/9273/9274 V 1.0 MARCH2007

IDT CONFIDENTIAL

6.28.4. PCBEEP Gen

[7]

Rsvd1

0x0

Reserved

[6.:0]

Offset

0x03

0dB-step is programmed with this offset

Table 446. PCBEEP Gen

Command Verb Format

Verb ID

Payload

Response

Get

F0A

See bitfield table.

Set1

70A

See bits [7:0] of bitfield table.

0000_0000h

Table 447. PCBEEP Gen

Command Response Format

Bit

Bitfield Name

Reset

Description

[31.:8]

Rsvd

0x0

Reserved

[7.:0]

Divider

0x0

Enable internal PC-Beep generation.

Divider = 00h - disables internal PC Beep

generation and enables normal operation of

the CODEC.

Divider not 00h - generates the beep tone

on all Pin Complexes that are currently

configured as outputs. The Azalia spec

states that the beep tone frequency =

(48 KHz Azalia SYNC rate) / (4*Divider),

producing tones from 47 Hz to 12 KHz

(logarithmic scale). Instead, this part

generates tones with frequency = 48000 *

(257 - Divider) / 1024, yielding a linear

range from 12 KHz to 93.75 Hz in steps of

46.875 Hz. If JackSenseVSR[Rate2x], then

the beep tones generated have frequency =

48000 * (513 - Divider) / 1024, yielding a

range of 24 KHz to 12093.75 Hz in steps of

46.875 Hz.

Table 445. PCBEEP OutAmpCap

Command Response Format

Bit

Bitfield Name

Reset

Description

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