ST STM32F446 Series

Serial peripheral interface/ inter-IC sound (SPI/I2S) RM0390
862/1328 RM0390 Rev 4
To close communication it is mandatory to follow these steps in order:
1. Disable DMA streams for Tx and Rx in the DMA registers, if the streams are used.
2. Disable the SPI by following the SPI disable procedure.
3. Disable DMA Tx and Rx buffers by clearing the TXDMAEN and RXDMAEN bits in the
SPI_CR2 register, if DMA Tx and/or DMA Rx are used.
Figure 314. Transmission using DMA
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