92hd75b Integrated Device Technology, 92hd75b Datasheet - Page 18

• Manufacturer Part Number: 92hd75b
• Description: Four Channel Hd Audio Codec
• Manufacturer: Integrated Device Technology

4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
D0-D3
92HD75B
4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
AFG Power
State
1.4.12. Digital Microphone Support
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
Asserted (Low)
The digital microphone interface permits connection of a digital microphone(s) to the CODEC via the
DMIC0, DMIC1 (48QFN package only), and DMIC_CLK 3-pin interface. The DMIC0 and DMIC1 sig-
nals 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.
92HD75B supports the following digital microphone configurations:
RESET#
GPIO Enable
Disabled
Disabled
Disabled
Enabled
-
Table 6. EAPD Behavior
Output Enable
18
Disabled
Disabled
Enabled
-
-
EAPD Power
D2-D3
D0-D1
State
-
-
-
92HD75B
output (internal pull-down enabled)
Active - Pin drives the value of the
Hi-Z (internal pull-down enabled)
Hi-Z (internal pull-down enabled)
Active - Pin Drives SPDIFOut0/1
retained until the rising edge of
otherwise the previous state is
configuration (internal pull-up
EAPD bit (internal pull-down
immediately after power on,
Active - Pin reflects GPIO0
Pin Behavior
RESET#
enabled)
enabled)
PC AUDIO
V 1.0 01-09