
15
V 1.3 08/11
2011 INTEGRATED DEVICE TECHNOLOGY, INC.
92HD73E
Ten Channel HD Audio Codec
Digital Mics
Data Sample
ADC Conn.
Notes
0
N/A
No Digital Microphones
1
Single Edge
0, or 1
Available on either DMIC_0 or DMIC_1
Both ADC Channels produce data, may be in phase or out by 1/2 DMIC_CLK
period depending upon external configuration and timing
2
Double Edge on
either DMIC_0 or 1
OR
Single Edge on
DMIC_0 and 1
0, or 1
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 capability. If both DMIC_0 and DMIC_1 are used to
support 2 digital microphones, 2 separate ADC units will be used, however, this
configuration is not recommended since it consumes two stereo ADC resources.
3
Double Edge on
one DMIC pin and
Single Edge on the
second DMIC pin.
0, or 1
Requires both 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 capability. Two ADC units are required to support
this configuration
4
Double Edge
0, or 1
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
Table 11. Valid Digital Mic Configurations
Power State
DMIC Widget
Enabled
DMIC_CLK
Output
DMIC_0,1
Notes
D0
Yes
Clock Capable
Input Capable
DMIC_CLK Output is Enabled when either DMIC_0 or DMIC_1
Input Widget is Enabled. Otherwise, the DMIC_CLK remains Low
D1-D3
Yes
Clock Disabled
Input Disabled
DMIC_CLK is HIGH-Z with Weak Pull-down
D0-D3
No
Clock Disabled
Input Disabled
DMIC_CLK is HIGH-Z with Weak Pull-down
Table 12. DMIC_CLK and DMIC_0,1 Operation During Power States