ATxmega128D4-AU ATMEL [ATMEL Corporation], ATxmega128D4-AU Datasheet - Page 42

• Manufacturer Part Number: ATxmega128D4-AU
• Description: 8/16-bit Atmel XMEGA D4 Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

21. SPI – Serial Peripheral Interface
21.1
21.2
8135L–AVR–06/12
Features
Overview
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The Serial Peripheral Interface (SPI) is a high-speed synchronous data transfer interface using
three or four pins. It allows fast communication between an Atmel AVR 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 and PORTD each has one SPI. Notation of these peripherals are SPIC and SPID.
Two Identical SPI peripherals
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
XMEGA D4
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