Question

Which of the following is correct?

(a) MOSI has the same meaning as the SDO

(b) SCLK is used to initiate and terminate the data transfer

(c) In 3 wire SPI, there is only one pin for transmission and reception

(d) In 3 wire SPI, there are three pins MOSI, MISO and SCLK

This question was addressed to me in an interview.

The doubt is from SPI Protocol in section AVR Microcontroller of Microcontroller

Answer 1

Right option is (c) In 3 wire SPI, there is only one pin for transmission and reception

To elaborate: In 3 wire SPI, there is only one pin for transmission and reception and the other two pins SCLK and CE are used for synchronization of data and for initialization and termination of data.