![]() MOSI -> Master output slave input (D OUT From Master).This process is the same whether it’s a read or write operation. The master initiates communication by generating a serial clock signal to shift a data frame out, at the same time serial data is being shifted-in to the master. One of them should be the master and the other will essentially be a slave. In typical SPI communication, there should be at least 2 devices attached to the SPI bus. The SPI was originally developed by Motorola back in the 80s to provide full-duplex serial communication to be used in embedded systems applications. Usually used to interface Flash Memories, ADC, DAC, RTC, LCD, SDcards, and much more. Which is an interface bus typically used for serial communication between microcomputer systems and other devices, memories, and sensors. SPI is an acronym for (Serial Peripheral Interface) pronounced as “S-P-I” or “Spy”.
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