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Which of the following can be used for long distance communication?(a) I2C(b) Parallel port(c) SPI(d) RS232The question was posed to me in exam.My question is based upon RS232 in division Basic Peripherals of Embedded Systems

Answer» CORRECT choice is (d) RS232

For explanation I would say: A slightly different serial port called RS232 is used for LONG distance communication, otherwise the clock may get skewed. The low VOLTAGE SIGNAL ALSO affects the long distance communication.


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