Figure 291. Msb Justified 16-Bit Or 32-Bit Full-Accuracy Length With Cpol = 0; Figure 292. Msb Justified 24-Bit Frame Length With Cpol = 0; Figure 293. Msb Justified 16-Bit Extended To 32-Bit Packet Frame With Cpol = 0 - ST STM32F412 Reference Manual

Serial peripheral interface/ inter-IC sound (SPI/I2S)

Figure 291. MSB Justified 16-bit or 32-bit full-accuracy length with CPOL = 0

Data are latched on the falling edge of CK (for transmitter) and are read on the rising edge
(for the receiver).
CK
WS
SD

Figure 293. MSB justified 16-bit extended to 32-bit packet frame with CPOL = 0

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).
840/1163
CK
Transmission
WS Reception
16- or 32 bit data
SD
MSB

Figure 292. MSB justified 24-bit frame length with CPOL = 0

Transmission
24 bit data
LSB
MSB
Channel left 32-bit
Transmission
16-bit data
MSB LSB
Channel left 32-bit
RM0402 Rev 6
LSB MSB
Channel left
Reception
8-bit remaining
0 forced
Reception
16-bit remaining
0 forced
Channel right
Channel right
Channel right
RM0402
MS30100 V1
MS30101V1
MS30102V1