====== Serial Peripheral Interface (SPI) ======

> 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.
>
> SPI follows a master–slave architecture, called main–sub herein, where one main device orchestrates communication with one or more sub (peripheral) devices by driving the clock and chip select signals. 
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> [[https://en.wikipedia.org/wiki/Serial_Peripheral_Interface|Wikipedia]]