![]() The Serial Peripheral Interface Bus provides full-duplex synchronous communication between a master device and a slave using four data lines. This article looks at the Serial Peripheral Interface (SPI) Bus, which has escaped explicit standardization, so always check the datasheet of the integrated circuit that you are working with before you implement the protocol. The three most common multi-wire serial data transmission formats that have been in use for decades are I 2C, UART, and SPI. This article provides the background information needed for novices to understand the interface. The Serial Peripheral Interface is used to transfer data between integrated circuits using a reduced number of data lines.
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