Interfacing Hardware
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RS-232 Serial Interface
Universal Serial Bus (“USB”)
The Serial Peripheral Interface (“SPI”)
“SPI devices communicate in full duplex mode using a master-slave architecture usually with a single master (though some Atmel devices support changing roles on the fly depending on an external (SS) pin). The master (controller) device originates the frame for reading and writing. Multiple slave-devices may be supported through selection with individual chip select (CS), sometimes called slave select (SS) lines”
“Sometimes SPI is called a four-wire serial bus, contrasting with three-, two-, and one-wire serial buses. The SPI may be accurately described as a synchronous serial interface, but it is different from the Synchronous Serial Interface (SSI) protocol, which is also a four-wire synchronous serial communication protocol. The SSI protocol employs differential signaling and provides only a single simplex communication channel. For any given transaction SPI is one master and multi slave communication” Source: Wikipedia
Http://figforth.org.uk/library/eZ80/SPI.Pages.from.eZ80F91.ASSP.Product.Spec-PS0270.pdf
I2C
Ethernet
References:
Enger, E. D., Ross, F. C. and Bailey, D. B., 2002. Concepts in Biology. 10th ed. New York: McGraw-Hill.