ST STM32F446 Series Reference Manual page 890

Serial peripheral interface/ inter-IC sound (SPI/I2S)
Bit 5 MODF: Mode fault
Note: This bit is not used in I
Bit 4 CRCERR: CRC error flag
Note: This bit is not used in I
Bit 3 UDR: Underrun flag
0: No underrun occurred
1: Underrun occurred
Note: This bit is not used in SPI mode.
Bit 2 CHSIDE: Channel side
0: Channel Left has to be transmitted or has been received
1: Channel Right has to be transmitted or has been received
Note: This bit is not used for SPI mode and is meaningless in PCM mode.
Bit 1 TXE: Transmit buffer empty
Bit 0 RXNE: Receive buffer not empty
890/1328
0: No mode fault occurred
1: Mode fault occurred
This flag is set by hardware and reset by a software sequence. Refer to
page 865 for the software sequence.
0: CRC value received matches the SPI_RXCRCR value
1: CRC value received does not match the SPI_RXCRCR value
This flag is set by hardware and cleared by software writing 0.
This flag is set by hardware and reset by a software sequence. Refer to
error flags for the software sequence.
0: Tx buffer not empty
1: Tx buffer empty
0: Rx buffer empty
1: Rx buffer not empty
2
S mode
2
S mode.
RM0390 Rev 4
RM0390
Section 26.4 on
Section 26.6.8: I2S