92hd99 Integrated Device Technology, 92hd99 Datasheet - Page 24
92hd99
Manufacturer Part Number
92hd99
Description
Single Chip Pc Audio System Codec+speaker Amplifier+capless Hp+ldo
Manufacturer
Integrated Device Technology
Datasheet
1.92HD99.pdf
(226 pages)
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92HD99
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
IDT CONFIDENTIAL
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
2.14. Analog PC-Beep
Microphones
The codec supports automatic routing of the PC_Beep pin to Port A, Port B, and Port D outputs
when the HD-Link is in reset.
When the link is active (not held in reset) Analog PC-Beep may be enabled manually. Analog
PC_Beep is mixed at the port and only ports enabled as outputs will pass PC_Beep.
Beep activity monitoring is provided when the analog beep path is enabled and the CODEC or ampli-
fier is in a low power state (D3).
The Analog PC Beep input is sampled for 500us every 1ms. If the beep input is high or low
(>200mVpp) for at least 37% of that time, it is considered active. If it is active for less than 7.5% of
Digital
Note: Some Digital Microphone Implementations support data on either edge, therefore, the
external mux may not be required.
DMIC_CLK
DMIC_0
DMIC_1
Or
Figure 6. Stereo Digital Microphone Configuration
Multiplexer
External
DMIC_CLK
Off-Chip
DMIC_0
DMIC_1
Channel
Pin
Pin
Right
Data R
Or
Valid
On-Chip
Channel
Data L
Multiplexer
Valid
Left
On-Chip
24
Data R
Valid
Data L
Valid
ADC0 or 1
STEREO
PCM
Data R
Valid
Stereo Channels
Output
V 0.91 10/10
92HD99
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