Transcription of Introduction • SPI Pin Functionality Features
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Introduction • SPI Pin Functionality Features
Atmel AVR 8-bit Microcontroller AVR151: Setup and Use of the SPI APPLICATION NOTEI ntroductionThis application note describes how to set up and use the on-chip SerialPeripheral Interface (SPI) of the Atmel AVR microcontroller. Most AVRdevices come with an on board SPI and can be configured according to thisdocument. This document contains, theoretical background and the steps toconfigure the SPI to run in both master mode and slave SPI Pin Functionality Multi Slave Systems SPI Timing SPI Transmission Conflicts Emulating the SPI Code examples for Polled operation Code examples for Interrupt Controlled operationAtmel-2585D-Setup-and-Use-of-th e-SPI_AVR151_Application Note-02/2016 Table of Description of the Transmission Between Master and of the Slave Systems - SS Pin For High Speed Transmission the 1: SPI Communication Controlled by 2: SPI Communication Controlled by AVR151.
The SPI consists of four different signal lines. These lines are the shift clock (SCK), the Master Out Slave In line (MOSI), the Master In Slave Out line (MISO) and the active low Slave Select line ( SS). When the SPI is enabled, the data direction of the MOSI, MISO, SCK, and SS pins are overridden according to the following table. Table 1-1.
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