SPI protocol theory of operation


Article background

In this article you will learn about Serial Peripheral Interface(SPI) protocol, its theory of operation and practical applications. Subscribe to enable complete access to all technical articles, online tests and projects.

This article will help you to gain required knowledge to successfully complete , , subsequently complete and earn course completion certificate for software jobs.

For practical applications of SPI protocol, go to project .

Article Contents

What is SPI protocol?

Serial Peripheral Interface (SPI) is an interface bus commonly used to send data between microcontrollers and small peripherals such as shift registers, sensors, and SD cards. It uses separate clock and data lines, along with a slave select line to choose the device to which communication is required.

The SPI bus is a high speed, 3-wire, serial communications protocol (4 if you include slave select pin). Its primiary purpose is to reduce on-PCB wire routing by replacing the traditional parallel bus where more pins are required with a serial interface.

Its only other real competition is the I2C bus which is why you often see these interfaces both available on processors and microcontrollers.

It is intended for transmission of data from a master device to one or more slave devices over short distances and at high speeds (MHz).

How SPI protocol Works?

To Read Full Article

You need to subscribe & logged in


Want to contribute or ask a new article? Write and upload your article info .


 Embedded Systems

 C Programming

 Linux Software

 Python Programming

 Search Code Snippets

 Popular C search examples

 Popular C search MCQs

 Online certificate courses

 Test your skills:online tests

 C Programming

 Python Programming

 Linux Software

 Quantitative Aptitude

 Embedded System Software