ATXMEGA128B1 Datasheet, PDF (41/138 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA B1 Microcontroller

23. SPI – Serial Peripheral Interface
23.1
Features
• One SPI peripheral
• Full-duplex, three-wire synchronous data transfer
• Master or slave operation
• Lsb first or msb first data transfer
• Eight programmable bit rates
• Interrupt flag at the end of transmission
• Write collision flag to indicate data collision
• Wake up from idle sleep mode
• Double speed master mode
23.2
Overview
The Serial Peripheral Interface (SPI) is a high-speed synchronous data transfer interface using three or four pins. It
allows fast communication between an XMEGA device and peripheral devices or between several microcontrollers. The
SPI supports full-duplex communication.
A device connected to the bus must act as a master or slave.The master initiates and controls all data transactions.
PORTC has one SPI. Notation of this peripheral is SPIC.
XMEGA B1 [DATASHEET] 41
8330C–AVR–07/2012