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SPI interface is emerging as a popular choice in automotive applications ranging from sensors, display console, navigation systems, booting through SPI Flash and many more. SPI low pin count and configurable clock rate facilitate the requirements of the emerging automotive applications.

Synchronous Serial Peripheral bus (SPI) allows synchronous serial communication between a controller and peripheral devices. It enables full duplex or half duplex communication with continuous streaming of data communicated between master (controller) and slave (peripheral devices). It can be configured in multiple architectures ranging from single master-single slave to multi master-multi slave systems. The master will always be the controller of bus activity on the interface between the connecting components. The serial protocol supports a low pin count interface that consists of Chip Select, Clock, and Data out from controller to peripheral device and Data into controller pins from peripheral device.

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