92HD66B Datasheet, PDF (28/286 Pages) Integrated Device Technology – FOUR CHANNEL HD AUDIO CODECS

92HD66B
FOUR CHANNEL HD AUDIO CODECS WITH DUAL CAPLESS HEADPHONE AMPLIFIERS
Figure 6. 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.
2.20. Analog PC-Beep
The codec supports automatic routing of the PC_Beep pin to several outputs when the HD-Link is in
reset. The codec will route PC_Beep to ports A, B, and F by default when reset is applied. To prevent
pops, beep is not enabled immediately when power is applied. 92HD90 will mute outputs and wait
until references and amplifiers have stabilized before enabling beep pass thru after power on reset.
To prevent pops when removing power, automatic routing of PC_Beep is not supported in D3cold,
D4, or D5.
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92HD66B