92HD98 データシートの表示（PDF） - Integrated Device Technology

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92HD98

SINGLE CHIP PC AUDIO SYSTEM

Integrated Device Technology 

92HD98

SINGLE CHIP PC AUDIO SYSTEM, CODEC+MONO SPEAKER AMPLIFIER+CAPLESS HP+LDO

POR

Wait

64mS

IDLE

NO

NO

Link Reset

Active?

NO

NO

NO

Analog

PC_Beep

Enabled?

YES

YES

Activity on Pin?

YES

Turn on

Amplifiers / Enable

Beep Path

YES

Activity on Pin?

Activity on Pin?

NO

NO

Inactivity over

threshold?

YES

Disable Beep

Path / Turn off

Amplifiers

Figure 9. Analog PC Beep Flow chart

2.15. Digital PC-Beep

This block uses an 8-bit divider value to generate the PC beep from the 48kHz HD Audio Sync

pulse. The digital PC_Beep block generates the beep tone on all Pin Complexes that are currently

configured as outputs. The HD Audio spec states that the beep tone frequency = (48kHz HD Audio

IDT CONFIDENTIAL

30

©2009 INTEGRATED DEVICE TECHNOLOGY, INC.

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92HD98

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