92HD99B Datasheet, PDF (26/225 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD99
SINGLE CHIP PC AUDIO SYSTEM, CODEC+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 8. 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
26
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
V1.2 1/12
92HD99