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For those individual circuits to swap information, they must share a common standard communication protocol. Many communication protocols have been designed toTouchpoint 4 Serial Communication Protocol Issue 1 09/07. CONTENTS. INTRODUCTION. 1. OVERVIEW. 1. GLOSSARY. 2. COMMUNICATION PORT. Asynchronous Serial (RS-232). • Commonly used for one to one communication. • Commonly used for one-to-one communication. • There are many variants, Discussion of Device-to-Device Communication Protocols. 6.111 Fall 2017 Serial (UART) (still common in some communication and GPS devices). Serial communication. Transmission of digital data one bit at a time, in sequence. Asynchronous communication but this is not the case for all protocols Unit 5 : Embedded communications protocols and Internet of things. Synchronous/Asynchronous interfaces (like UART, SPI, I2C, USB), serial communication I2C Bus communica on− use of only simplifies the number of connections and provides a common way (protocol) of connecting different or same type of I/O devices The OSI reference model organizes network functions into seven numbered layers. Each layer provides a service to the layer above it in the protocol