RM0440 Rev 4 1811/2126
RM0440 Serial audio interface (SAI)
1858
Figure 619. SAI_ADR format in TDM, 16-bit slot width
• Using a 8-bit slot width (DS = 0b010 and SLOTSZ = 0). Refer to Figure 620.
For an 8 microphone configuration, 8 consecutive words read from the SAI_ADR
register contain a byte of data from each microphone. Note that the 8-bit data of
SAI_ADR are right aligned.
For 4 or 2 microphone configuration, the SAI behavior is similar to 8 microphone
configurations. Up to 4 words of 8 bits are required to acquire a byte from 4
microphones and 2 words from 2 microphones.
MSv35471V1
b31 b0
M4L-1
M4L-2
M4L-3
M4L-4
M4L-5
M4L-6
M4L-7
M4L-8
M4R-1
M4R-2
M4R-3
M4R-4
M4R-5
M4R-6
M4R-7
M4R-8
LSBFIRST = 0
word 4n
word 4n+3
8 Microphones configuration
b31 b0
LSBFIRST = 0
4 Microphones configuration
b31 b0
LSBFIRST = 0
2 Microphones configuration
M1L-1
M1L-2
M1L-3
M1L-4
M1R-1
M1R-2
M1R-3
M1R-4
M1L-5
M1L-6
M1L-7
M1L-8
M1R-5
M1R-6
M1R-7
M1R-8
zeros
M2L-1
M2L-2
M2L-3
M2L-4
M2L-5
M2L-6
M2L-7
M2L-8
M2R-1
M2R-2
M2R-3
M2R-4
M2R-5
M2R-6
M2R-7
M2R-8
zeros
zeros
...
word 4n+1
word 2n
M1L-1
M1L-2
M1L-3
M1L-4
M1R-1
M1R-2
M1R-3
M1R-4
M1L-5
M1L-6
M1L-7
M1L-8
M1R-5
M1R-6
M1R-7
M1R-8
zeros
M2L-1
M2L-2
M2L-3
M2L-4
M2L-5
M2L-6
M2L-7
M2L-8
M2R-1
M2R-2
M2R-3
M2R-4
M2R-5
M2R-6
M2R-7
M2R-8
zeros
word 2n+1
word 2n
M1L-1
M1L-2
M1L-3
M1L-4
M1R-1
M1R-2
M1R-3
M1R-4
M1L-5
M1L-6
M1L-7
M1L-8
M1R-5
M1R-6
M1R-7
M1R-8
zeros
b16 b15
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