Table 360. Tdm Settings; Figure 619. Sai_Adr Format In Tdm, 8-Bit Slot Width - ST STM32G4 Series Reference Manual

RM0440
b31
word 8n
word 8n+1
word 8n+7
b31
word 4n
word 4n+1
word 4n+3
b31
word 2n
word 2n+1
TDM configuration for PDM interface
SAI_A TDM interface is internally connected to the PDM interface to get the microphone
samples. The user application must configure the PDM interface as shown in
ensure a good connection with the PDM interface.
Bit Fields
MODE
PRTCFG
DS
LSBFIRST
CKSTR
MONO
FRL
FSALL
FSDEF

Figure 619. SAI_ADR format in TDM, 8-bit slot width

8 Microphones configuration
zeros
zeros
zeros
4 Microphones configuration
zeros
zeros
zeros
2 Microphones configuration
zeros
zeros

Table 360. TDM settings

Values
0b01 Mode must be MASTER receiver
0b00 Free protocol for TDM
To be adjusted according to the required data format, in accordance to the
X
frame length and the number of slots (FRL and NBSLOT). See
X This parameter can be used according to the wanted data format
Signal transitions occur on the rising edge of the SCK_A bit clock. Signals
0
are stable on the falling edge of the bit clock
0 Stereo mode
To be adjusted according to the number of microphones (MICNBR). See
X
Table 361.
0 Pulse width is one bit clock cycle
0 FS signal is a start of frame
RM0440 Rev 1
Serial audio interface (SAI)
LSBFIRST = 0
b8
...
LSBFIRST = 0
...
LSBFIRST = 0
Comments
.
b7 b0
b0
b0
MSv35472V1
Table 360
Table 361.
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