ST STM32F301 6 Series Reference Manual page 812

Serial peripheral interface / integrated interchip sound (SPI/I2S)
Data are latched on the falling edge of CK (for transmitter) and are read on the rising edge
(for the receiver).
CK
WS
SD
CK
WS
SD
LSB justified standard
This standard is similar to the MSB justified standard (no difference for the 16-bit and 32-bit
full-accuracy frame formats).
The sampling of the input and output signals is the same as for the I
812/874
Figure 325. MSB Justified 16-bit or 32-bit full-accuracy length
CK
Transmission
WS
SD
MSB
Figure 326. MSB justified 24-bit frame length
Transmission
24 bit data
LSB
MSB
Channel left 32-bit
Figure 327. MSB justified 16-bit extended to 32-bit packet frame
Transmission
16-bit data
MSB LSB
Channel left 32-bit
RM0366 Rev 5
Reception
16- or 32 bit data
LSB MSB
Channel left
Reception
8-bit remaining
0 forced
Reception
16-bit remaining
0 forced
Channel right
Channel right
Channel right
2
S Philips standard.
RM0366
MS30100 V1
MS30101V1
MS30102V1