Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
665
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
33.4
Application Block Diagram
Figure 33-2.
Application Block Diagram: Single Master/Multiple Slave Implementation
33.5
Signal Description
33.6
Product Dependencies
33.6.1 I/O Lines
The pins used for interfacing the compliant external devices can be multiplexed with PIO lines. The programmer
must first program the PIO controllers to assign the SPI pins to their peripheral functions.
SPI Master
SPCK
MISO
MOSI
NPCS0
NPCS1
NPCS2
SPCK
MISO
MOSI
NSS
Slave 0
SPCK
MISO
MOSI
NSS
Slave 1
SPCK
MISO
MOSI
NSS
Slave 2
NC
NPCS3
Table 33-1.
Signal Description
Pin Name
Pin Description
Type
Master
Slave
MISO
Master In Slave Out
Input
Output
MOSI
Master Out Slave In
Output
Input
SPCK
Serial Clock
Output
Input
NPCS1-NPCS3
Peripheral Chip Selects
Output
Unused
NPCS0/NSS
Peripheral Chip Select/Slave Select
Output
Input
Table 33-2.
I/O Lines
Instance
Signal
I/O Line
Peripheral
SPI
MISO
PA12
A
SPI
MOSI
PA13
A