Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
804
Figure 35-38. SPI Transfer Format (CPHA=1, 8 bits per transfer)
Figure 35-39. SPI Transfer Format (CPHA=0, 8 bits per transfer)
6
SCK
(CPOL = 0)
SCK
(CPOL = 1)
MOSI
SPI Master ->TXD
SPI Slave -> RXD
NSS
SPI Master -> RTS
SPI Slave -> CTS
SCK cycle (for reference)
MSB
MSB
LSB
LSB
6
6
5
5
4
4
3
3
2
2
1
1
123 45 786
MISO
SPI Master ->RXD
SPI Slave -> TXD
SCK
(CPOL = 0)
SCK
(CPOL = 1)
123 45 7
MOSI
SPI Master -> TXD
SPI Slave -> RXD
MISO
SPI Master -> RXD
SPI Slave -> TXD
NSS
SPI Master -> RTS
SPI Slave -> CTS
SCK cycle (for reference)
8
MSB
MSB
LSB
LSB
6
6
5
5
4
4
3
3
1
1
2
2
6