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How many logic signals are there in SPI?(a) 5 signals(b) 6 signals(c) 4 signals(d) 7 signalsThe question was posed to me in an online quiz.My question is from SPI Protocol in division Internet Principles of IOT

Answer»

Right option is (a) 5 signals

The best explanation: The SPI BUS specifies five logic signals:

 SCLK: Serial clock(OUTPUT from MASTER)

 MOSI: Master Output Input, Master Out Slave In(data output from master)

 MISO: Master Input Slave Output, or master In Slave Out( data output from master)

 SDIO: Serial Data I/O(bidirectional I/O)

 SS: Slave Select(OFTEN ACTIVE low, output from master).



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