What is the Serial Peripheral Interface (SPI) bus?

Date:2023-01-07
The Serial Peripheral Interface (SPI) bus is a synchronous serial data link designed to interconnect devices such as microcontrollers, sensors, and other peripherals. It operates at relatively low clock speeds, usually between 100Khz and 8MHz. It has four wires – a clock (SCK), chip-select (CS), data-in (MOSI), and data-out (MISO). This bus is often used to connect the microcontroller to external devices such as analog-to-digital converters, shift registers, and sensors.
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