92HD91 Datasheet, PDF (31/298 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD91
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
Figure 7. Quad Digital Microphone Configuration
Digital
Microphones
Off-Chip On-Chip
External
Multiplexer
DMIC_0
On-Chip
Multiplexer
Pin
STEREO
ADC0
PCM
Stereo Channels
Output For
DMIC_0 L&R
Digital
Microphones
DMIC_CLK
Pin
DMIC_1
Pin
External
Multiplexer
On-Chip
Multiplexer
STEREO
ADC1
PCM
DMIC_0
Valid
Valid
Valid
Valid
Valid
Data R0 Data L0 Data R0 Data L0 Data R0
DMIC_1
DMIC_CLK
Valid
Valid
Valid
Data R1 Data L1 Data R1
Right
Left Right
Channel Channel Channel
Valid
Valid
Data L1 Data R1
Left
Channel
Stereo Channels
Output For
DMIC_1 L&R
Note: Some Digital Microphone Implementations support data on either edge, in this case the
external multiplexer is not required.
2.16. Analog PC-Beep
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.
IDT™ CONFIDENTIAL
31
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
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92HD91