bit RISC Microcontroller

Atmel Corporation

Description

Niveau: Supérieur, Master
8-bit RISC Microcontroller Application Note AVR151: Setup And Use of The SPI Features • SPI Pin Functionality ? Multi Slave Systems ? SPI Timing ? SPI Transmission Conflicts ? Emulating the SPI ? Code examples for Polled operation ? Code examples for Interrupt Controlled operation 1. Introduction This application note describes how to setup and use the on-chip Serial Peripheral Interface (SPI) of the AVR micro-controller. Most AVR devices come with an on board SPI and can be configured according to this document. After a theoretical background it will be shown how to configure the SPI to run in both master mode and slave mode Figure 1. Master and Slave Interface. Receive Buffer MOSI MISOShift-Register DATABUS Receive Buffer MISO MOSI DATABUS Slave Mode SPI Clock Generator Master Mode MISO MOSI SCK SS VCC SS Shift- Register Rev. 2585C–AVR–07/08

• spi


• ss pin


• multi slave


• spi timing ?


• sck mosi


• configuration spi


• interaction between


• rising falling

Informations

• Publié par: profil-mupheg-2012
• Nombre de lectures: 6
• Langue: English

Extrait

AVR151: Setup And Use of The SPI

Features  SPI Pin Functionality Multi Slave Systems SPI Timing SPI Transmission Conflicts Emulating the SPI Code examples for Polled operation  Code examples for Interrupt Controlled operation

1.

Introduction

This application note describes how to setup and use the onchip Serial Peripheral Interface (SPI) of the AVR microcontroller. Most AVR devices come with an on board SPI and can be configured according to this document. After a theoretical background it will be shown how to configure the SPI to run in both master mode and slave mode

Figure 1.Master and Slave Interface.

Master Mode

DATABUS

Receive Buffer

Shift MOSI MISO Register

SPI Clock Generator

MISO

MOSI

SCK

SS V CC

SS

Receive Buffer

Shift MISO MOSI Register

Slave Mode

DATABUS

8-bit RISC Microcontroller

Application Note

Rev. 2585C–AVR–07/08