Question

In which register does the data is written in the master device?

(a) index register

(b) accumulator

(c) SPDR

(d) status register

I had been asked this question during an interview for a job.

I need to ask this question from Serial Port and Serial Peripheral Interface in section Basic Peripherals of Embedded Systems

Answer 1

Right answer is (c) SPDR

For explanation: The serial peripheral interface follows a master slave mechanism in which the data is written to the SPDR register in the master device and clocked out into the slave device SPDR by using a common clock signal called SCK.