ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 591

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 32-4.
Figure 32-3. SPI Transfer Format (NCPHA = 1, 8 bits per transfer)
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
SPCK cycle (for reference)
SPI Mode
(from master)
(from slave)
(CPOL = 0)
(CPOL = 1)
(to slave)
0
1
2
3
SPCK
SPCK
MOSI
MISO
NSS
SPI Bus Protocol Mode
* Not defined, but normally MSB of previous character received.
CPOL
same parameter pair values to communicate. If multiple slaves are used and fixed in different
configurations, the master must reconfigure itself each time it needs to communicate with a dif-
ferent slave.
Table 32-4
Figure 32-3
0
0
1
1
MSB
1
MSB
NCPHA
shows the four modes and corresponding parameter settings.
and
1
0
1
0
2
Figure 32-4
6
6
3
Shift SPCK Edge
5
5
show examples of data transfers.
Falling
Falling
Rising
Rising
4
4
4
5
3
3
Capture SPCK Edge
6
6
2
2
Falling
Falling
Rising
Rising
7
1
1
SAM3U Series
SAM3U Series
8
LSB
LSB
SPCK Inactive Level
High
High
Low
Low
*
591
591