Datasheet

655
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-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