DocID018909 Rev 11
897/1731
RM0090
Serial peripheral interface (SPI)
918
Figure 271. MSB Justified 24-bit frame length with CPOL = 0
Figure 272. MSB Justified 16-bit extended to 32-bit packet frame with CPOL = 0
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).
Figure 273. LSB justified 16-bit or 32-bit full-accuracy with CPOL = 0
CK
WS
SD
Channel left 32-bit
Channel right
MSB
LSB
8-bit remaining
0 forced
24-bit data
Transmission
Reception
CK
WS
SD
Channel left 32-bit
Channel right
MSB
LSB
16-bit remaining
0 forced
16-bit data
Transmission
Reception
MSB
LSB MSB
CK
WS
SD
Channel left
Channel right
May be 16-bit, 32-bit
Transmission
Reception