Figure 264. I 2 S Philips Protocol Waveforms (16/32-Bit Full Accuracy, Cpol = 0); Figure 265. I 2 S Philips Standard Waveforms (24-Bit Frame With Cpol = 0) - STMicroelectronics STM32F405 Reference Manual

Serial peripheral interface (SPI)
Figure 264. I
CK
WS
SD
Data are latched on the falling edge of CK (for the transmitter) and are read on the rising
edge (for the receiver). The WS signal is also latched on the falling edge of CK.
Figure 265. I
CK
WS
SD
This mode needs two write or read operations to/from the SPI_DR.
•
In transmission mode:
if 0x8EAA33 has to be sent (24-bit):
894/1731
2
S Philips protocol waveforms (16/32-bit full accuracy, CPOL = 0)
Transmission
May be 16-bit, 32-bit
MSB
Channel left
2
S Philips standard waveforms (24-bit frame with CPOL = 0)
Transmission
24-bit data
MSB LSB
Channel left 32-bit
DocID018909 Rev 11
Reception
Reception
8-bit remaining
0 forced
RM0090
LSB MSB
Channel right
Channel right