SPI in embedded systems is a serial communication protocol that allows microcontrollers and devices such as sensors, displays, and memory chips to exchange data quickly and reliably. It operates on a master-slave setup where the master controls the clock, and data moves through lines such as MISO, MOSI, SCK, and CS. SPI comes in types such as full-duplex, half-duplex, and multi-slave connections, making it flexible for a variety of uses. It finds applications in areas such as transferring data between processors, controlling LCDs, communicating with ADCs or DACs, and connecting memory cards. The main advantages of SPI include fast speed, simple design, and efficient data handling, while its disadvantages include high pin utilization and limited distance support.
What Is SPI in Embedded System? Types, Applications, Working, Pros & Cons