![]() ![]() SPI may be accurately described as a synchronous serial interface, but it is different from the Synchronous Serial Interface (SSI) protocol. Typical applications include interfacing microcontrollers with peripheral chips for Secure Digital cards, liquid crystal displays, analog-to-digital and digital-to-analog converters, flash and EEPROM memory, and various communication chips. It is sometimes called a four-wire serial bus to contrast with three-wire variants which are half duplex, and with the two-wire I☬ and 1-Wire serial buses. Motorola's original specification uses four wires to perform full duplex communication. SPI uses a master–slave architecture, described here with the terms "main" and "sub", where one main device orchestrates communication with some number of peripheral (sub) devices by driving the clock signal and chip select signal(s). Serial Peripheral Interface ( SPI) is a de facto standard (with many variants) for synchronous serial communication, used primarily in embedded systems for short-distance wired communication between integrated circuits. Please try to keep recent events in historical perspective and add more content related to non-recent events. ![]() ![]() This article appears to be slanted towards recent events. ![]()
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