Serial Peripheral Interface: Difference between revisions

Revision as of 23:31, 4 January 2025

Revision as of 01:54, 23 January 2025

Line 27:

}}

'''Serial Peripheral Interface''' ('''SPI''') is a [[de<!--DO factoNOT standard|''ITALICIZE; CONSIDERED ANGLICIZED-->[[de facto'' standard]] (with many [[#Variations|variants]]) for [[Comparison of synchronous and asynchronous signalling|synchronous]] [[serial communication]], used primarily in [[embedded systems]] for short-distance [[wired communication]] between [[integrated circuits]].

SPI follows a [[master–slave (technology)|master–slave architecture]], <ref name=":0">{{Cite web |last=Dhaker |first=Piyu |date=2018 |title=Introduction to SPI Interface |url=https://www.analog.com/en/analog-dialogue/articles/introduction-to-spi-interface.html |url-status=live |archive-url=https://web.archive.org/web/20230525152752/https://www.analog.com/en/analog-dialogue/articles/introduction-to-spi-interface.html |archive-date=2023-05-25 |access-date=2023-07-21 |website=[[Analog Dialogue]]}}</ref> called ''main–sub'' herein, {{NoteTag|Using main and sub maintains the same initial letters to remain in sync with the line names. For example MISO could be expanded as "main in, sub out"}} {{NoteTag|The {{slink||Alternative terminology}} section gives more details on proposed alternative terminology. See [[Talk:Serial Peripheral Interface#Terminology|the talk page]] for an ongoing discussion.}} where one{{NoteTag|For any given transaction, only one device is the main. However, some devices support changing main and sub roles on the fly. Most microcontrollers can easily reconfigure their SPI's role, and some Atmel and Silabs devices can change roles depending on an external pin.}} main device [[Signaling (telecommunications)|orchestrates communication]] with one or more sub (peripheral) devices by driving the [[clock signal|clock]] and [[chip select]] signals.