at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 391

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

30.4
Table 30-1.
30.5
30.5.1
30.5.2
30.5.3
6384B–ATARM–15-Dec-08
Pin Name
MISO
MOSI
SPCK
NPCS1-NPCS3
NPCS0/NSS
Signal Description
Product Dependencies
I/O Lines
Power Management
Interrupt
Signal Description
The pins used for interfacing the compliant external devices may be multiplexed with PIO lines.
The programmer must first program the PIO controllers to assign the SPI pins to their peripheral
functions.
The SPI may be clocked through the Power Management Controller (PMC), thus the program-
mer must first configure the PMC to enable the SPI clock.
The SPI interface has an interrupt line connected to the Advanced Interrupt Controller (AIC).
Handling the SPI interrupt requires programming the AIC before configuring the SPI.
Pin Description
Master In Slave Out
Master Out Slave In
Serial Clock
Peripheral Chip Selects
Peripheral Chip Select/Slave Select
AT91SAM9G20 Preliminary
Master
Input
Output
Output
Output
Output
Type
Slave
Output
Input
Input
Unused
Input
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