• 07/14/2017
  • Public Content
Contents

I2S Interface Specifications

One I2S port is provided by the J7 board-to-board connector interface.
See also: Audio Interface in the Expansion Board Design Guide, and I2S Interface in the Expansion Board Hardware Datasheet.
I2S Available Formats
The I2S formats listed below have not been verified and are subject to change.
Notes
: All Bits/Sample in the following tables are 16,24. Right justified is not supported.
Priority 1
Mode
Frame-rate
Number of slots
Frame to data offset
Frame polarity
Frame width
Frame rate inaccuracy
Notes
I2S master
192K,96K, 48K, 16K, 8K
2
1
0-left, 1-right
50/50
0%
Standard I2S protocol. 50% duty
PCM slave -SFS
192K,96K, 48K, 44.1K, 16K, 8K
192kHz: 2 96 kHz: 4 All else: 1 to 6
0
High
 
 
 
PCM slave - LFS
192K, 96K, 48K, 44.1K, 16K,8K
192 kHz: 2 96 kHz: 4 All else: 1 to 6
0
High
 
0%
 
PCM master -SFS
192K, 96K, 48K, 16K, 8K
192 kHz: 2 All else: 1 to 4
0
High
1 bit clock wide
0%
Rising edge frame sensitive. Design supports more frame- to-data offset options.
PCM master - LFS
192K, 96K, 48K, 16K, 8K
92 kHz: 2 All else: 1 to 4
0
High
1-bit to n-bit clocks
0%
Design supports width > 1 slot.
Priority 2
Mode
Frame-rate
Number of slots
Frame to data offset
Frame polarity
Frame width
Frame rate inaccuracy
Notes
Left justified master
192K,96K, 48K
2
0
0-left, 1-right
50/50
0%
Design supports flipping polarity on the frame signal.
Priority 3
Mode
Frame-rate
Number of slots
Frame to data offset
Frame polarity
Frame width
Frame rate inaccuracy
Notes
I2S slave
192K,96K, 48K,44.1K
2
0
0-left, 1-right
50/50
0%
 
Left justified slave
192K,96K, 48K
2
0
0-left, 1-right
50/50
0%
 
Digital microphone ports
The Intel® Joule™ module supports microphones that use the PDM digital microphone standard and attached to the module through the AVS_M interface. Two microphones can share one data line by using time domain multiplexing to the two slots.
PDM microphones are enabled and disabled by the clock signal. Absence of clock signal will switch microphone to sleep mode, which can be utilized in system power management.
Additionally the microphones can be power-gated to cut the power consumption to zero when microphones are not used.
 

Product and Performance Information

1

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Notice revision #20110804