ATXMEGA128A4 Datasheet, PDF (35/69 Pages) ATMEL Corporation – 8/16-bit XMEGA A4 Microcontroller

XMEGA A4
20. SPI - Serial Peripheral Interface
20.1 Features
20.2 Overview
• Two Identical SPI peripherals
• Full-duplex, Three-wire Synchronous Data Transfer
• Master or Slave Operation
• LSB First or MSB First Data Transfer
• Seven Programmable Bit Rates
• End of Transmission Interrupt Flag
• Write Collision Flag Protection
• Wake-up from Idle Mode
• Double Speed (CK/2) Master SPI Mode
The Serial Peripheral Interface (SPI) allows high-speed full-duplex, synchronous data transfer
between different devices. Devices can communicate using a master-slave scheme, and data is
transferred both to and from the devices simultaneously.
PORTC and PORTD each has one SPI. Notation of these peripherals are SPIC and SPID,
respectively.
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8069C–AVR–06/08