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STAC9227/9228/9229/9230
8-CHANNEL HIGH DEFINITION AUDIO CODEC
PC AUDIO
IDT
8-CHANNEL HIGH DEFINITION AUDIO CODEC
188
STAC9227/9228/9229/9230V 1.0 MARCH 2007
IDT CONFIDENTIAL
6.29. CD Node (NID = 0x12)
6.29.1.
CD WCap
Table 446. PCBEEP Gen
Command Response Format
Bit
Bitfield Name
RW
Reset
Description
[31:8]
Rsvd
R
0x0
Reserved
[7:0]
Divider
RW
0x0
Enable internal PC-Beep generation.
Divider is 00h - disables internal PC Beep
generation and enables normal operation of
the CODEC.
Divider is 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 447. CD WCap
Command Verb Format
Verb ID
Payload
Response
Get
F00
09
See bitfield table.
Table 448. CD WCap
Command Response Format
Bit
Bitfield Name
RW
Reset
Description
[31:24]
Rsvd2
R
0x0
Reserved
[23:20]
Type
R
0x4
Widget type = Pin Complex
[19:16]
Delay
R
0x0
Number of sample delays through widget