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serial peripheral interface

serial peripheral interface in Technology
communications, hardware
(SPI) A serial interface in which a master device supplies clock pulses to exchanges data serially with a slave over two data wires (Master-Slave and Slave-Master). This term probably originated with Motorola in about 1979 with their first all-in-one microcontroller.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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