Figure 273. Msb Justified 16-Bit Extended To 32-Bit Packet Frame With Cpol = 0; Figure 274. Lsb Justified 16-Bit Or 32-Bit Full-Accuracy With Cpol = 0; Figure 275. Lsb Justified 24-Bit Frame Length With Cpol = 0 - ST STM32F205 series Reference Manual

Serial peripheral interface (SPI)

Figure 273. 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).
CK
WS
SD
•
In transmission mode:
If data 0x3478AE have to be transmitted, two write operations to the SPI_DR register
are required from software or by DMA. The operations are shown below.
714/1378
Transmission
16-bit data
MSB

Figure 274. LSB justified 16-bit or 32-bit full-accuracy with CPOL = 0

CK
WS
Transmission
16- or 32-bit data
SD
MSB
Channel left

Figure 275. LSB justified 24-bit frame length with CPOL = 0

8-bit data
0 forced
Reception
16-bit remaining
0 forced
LSB
Channel left 32-bit
Reception
LSB
MSB
Channel right
Transmission
24-bit remaining
MSB
Channel left 32-bit
RM0033 Rev 8
Channel right
Reception
LSB
Channel right
RM0033
MS30102V1
MS30103V1
MS30104V1