RM0453
NSS
SCK
BSY
MOSI
SPE
TXE
FTLVL
00
MISO
RXNE
DMA or software control at Rx events
FRLVL
DMA Tx TICF
Assumptions for master full-duplex communication with CRC example:
•
Data size = 16 bit
•
CRC enabled
If DMA is used:
•
Number of Tx frames transacted by DMA is set to 2
•
Number of Rx frames transacted by DMA is set to 3
See also
and notes.
Serial peripheral interface / integrated interchip sound (SPI/I2S)
Figure 358. Master full-duplex communication with CRC
MSB
DTx1
3
Enable Tx/Rx DMA or interrupts
DTx2
DTx1
10
11
10
4
DRx1
1
00
5
: Communication diagrams on page 1274
2
MSB
DTx2
DMA or software control at Tx events
LSB
DRx2
LSB
DRx1
10
00
10
DMA Rx TICF
for details about common assumptions
RM0453 Rev 2
MSB
CRC
00
CRC
LSB
DRx2
DRx3
00
10
6
1
00
MSv32124V2
1277/1454
1315
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