ATXMEGA32D4-CU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA32D4-CU

8/16-bit Atmel XMEGA D4 Microcontroller

Atmel Corporation 

XMEGA D4

21. SPI – Serial Peripheral Interface

21.1 Features

• 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

21.2 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 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.

42

8135L–AVR–06/12

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