92hd81 Integrated Device Technology, 92hd81 Datasheet - Page 24

• Manufacturer Part Number: 92hd81
• Description: Single Chip Pc Audio System
• Manufacturer: Integrated Device Technology

SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
Power State DMIC Widget
92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
Digital Mics
D1-D3
D0-D3
D0
0
1
2
3
4
one DMIC pin and
the second DMIC
either DMIC_0 or
Enabled?
Double Edge on
Double Edge on
Single Edge on
Double Edge
Data Sample
Single Edge
Yes
Yes
No
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.
To conserve power, the analog portion of the ADC will be turned off if the D-mic input is selected.
When switching from the digital microphone to an analog input to the ADC, the analog portion of the
ADC will be brought back to a full power state and allowed to stabilize before switching from the dig-
ital microphone to the analog input. This should take less than 10mS.
DMIC pin widgets support port presence detect directly using SENSE-B input.
The codec supports the following digital microphone configurations:
N/A
pin.
1
Clock Capable Input Capable DMIC_CLK Output is Enabled when either DMIC_0 or
DMIC_CLK
Disabled
Disabled
Output
Clock
Clock
ADC Conn.
0, or 1
0, or 1
0, or 1
0, or 1
N/A
Input Disabled DMIC_CLK is HIGH-Z with Weak Pull-down
Input Disabled DMIC_CLK is HIGH-Z with Weak Pull-down
No Digital Microphones
Available on either DMIC_0 or DMIC_1
When using a microphone that supports multiplexed operation (2-mics
can share a common data line), configure the microphone for “Left” and
select mono operation using the vendor specific verb.
“Left” D-mic data is used for ADC left and right channels.
Available on either DMIC_0 or DMIC_1, External logic required to support
sampling on a single Digital Mic pin channel on rising edge and second
Digital Mic right channel on falling edge of DMIC_CLK for those digital
microphones that don’t support alternative clock edge (multiplexed output)
capability.
Requires both DMIC_0 and DMIC_1, External logic required to support
sampling on a single Digital Mic pin channel on rising edge and second
Digital Mic right channel on falling edge of DMIC_CLK for those digital
microphones that don’t support alternative clock edge (multiplexed output)
capability. Two ADC units are required to support this configuration
Connected to DMIC_0 and DMIC_1, External logic required to support
sampling on a single Digital Mic pin channel on rising edge and second
Digital Mic right channel on falling edge of DMIC_CLK for those digital
microphones that don’t support alternative clock edge capability. Two
ADC units are required to support this configuration
DMIC_0,1
24
DMIC_1 Input Widget is Enabled. Otherwise, the
DMIC_CLK remains Low
Notes
92HD81
Notes
PC AUDIO
V 0.97 01/09