92HD73C Просмотр технического описания (PDF) - Integrated Device Technology

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92HD73C

SIX CHANNEL HD AUDIO CODEC

Integrated Device Technology 

92HD73C

SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT

PC AUDIO

Audio R

Audio L

CODEC

EAPD

Audio R

Audio L

CODEC

EAPD

SPKR R+

SPKR R-

Input R

Input L

SPKR L+

SPKR L-

SHUTDOWN

OR

SPKR R+

SPKR R-

Input R

Input L

SPKR L+

SPKR L-

MUTE

Figure 5. EAPD

1.4.13.

Digital Microphone Support

The digital microphone interface permits connection of a digital microphone(s) to the CODEC via the

DMIC0, DMIC1, and DMIC_CLK 3-pin interface. The DMIC0 and DMIC1 signals are inputs that carry

individual channels of digital Mic data to the ADC. In the event that a single microphone is used, the

data is ported to both ADC channels.

The DMIC_CLK output is controllable from 4.704Mhz, 3.528Mhz, 2.352Mhz, 1.176Mhz and is syn-

chronous to the 24Mhz internal clock. The default frequency is 2.352Mhz.

The two DMIC data inputs are reported as two stereo input pin widgets that incorporate a boost

amplifier. The pin widgets are shown connected to the ADCs through the same multiplexors as the

analog ports. Although the internal implementation is different between the analog ports and the dig-

ital microphones, the functionality is the same. In most cases, the default values for the DMIC clock

rate and data sample phase will be appropriate and an audio driver will be able to configure and use

the digital microphones exactly like an analog microphone.

92HD73C supports the following digital microphone configurations:

23

SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT

92HD73C

V 1.3 08/11

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