Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Data Sheet
Product codes
AT91SAM9G25-EK
677
SAM9G25 [DATASHEET]
11032D–ATARM–10-Mar-2014
Figure 35-3. SPI Transfer Format (NCPHA = 1, 8 bits per transfer)
Figure 35-4. SPI Transfer Format (NCPHA = 0, 8 bits per transfer)
6
*
SPCK
(CPOL = 0)
SPCK
(CPOL = 1)
MOSI
(from master)
MISO
(from slave)
NSS
(to slave)
SPCK cycle (for reference)
MSB
MSB
LSB
LSB
6
6
5
5
4
4
3
3
2
2
1
1
* Not defined, but normally MSB of previous character received.
1
2
3
4
5
7
8
6
*
SPCK
(CPOL = 0)
SPCK
(CPOL = 1)
1
2
3
4
5
7
MOSI
(from master)
MISO
(from slave)
NSS
(to slave)
SPCK cycle (for reference)
8
MSB
MSB
LSB
LSB
6
6
5
5
4
4
3
3
1
1
* Not defined but normally LSB of previous character transmitted.
2
2
6