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The serial bus interfaces are widely used for interfacing EEPROMs, data converters and many peripheral chips to microcontrollers. They are also often used for inter-microcontroller communication. Serial bus system are also used to build control buses inside equipments like TV receivers, AV amplifiers and cellular phones.
The major advantage of usign s serial bus is the small number of wires needed. A major disadvantage of serial interfacing is the tradeoff of speed for space. The processor’s I/O port spends a relatively large amount of time communicating with a serial device. Consequently, serial converters with throughput rates above 500 ksps are uncommon.
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