When observing SPI communication with an oscilloscope, I see that there is some time between 'words' sent over the network. Red signal is SPI clk, and the blue is MISO.
My question is: What exactly happens in this time? As can be seen in my case this lasts about 500 ns. Is this duration dependent on the frequency of the SPI clock or on the CPU frequency?
I know that the number of bits that can be sent without this 'interruption' is dependent on the microcontroller. I have found microcontollers with 8 bit and 16 bit mode of operation. Are there also some with 32 bit mode of operation?