92hd73c Integrated Device Technology, 92hd73c Datasheet - Page 23
92hd73c
Manufacturer Part Number
92hd73c
Description
Four Channel Hd Audio Codec
Manufacturer
Integrated Device Technology
Datasheet
1.92HD73C.pdf
(253 pages)
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SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
92HD73C
SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
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:
CODEC
CODEC
Audio R
Audio R
Audio L
Audio L
EAPD
EAPD
Figure 5. EAPD
OR
23
SHUTDOWN
MUTE
Input R
Input R
Input L
Input L
SPKR R+
SPKR L+
SPKR R+
SPKR L+
SPKR R-
SPKR L-
SPKR R-
SPKR L-
92HD73C
PC AUDIO
V 1.0 03/08
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