Is there a defined time interval between the clocks of 2 bytes during SPI timing?

edit

No, there is no defined time interval between the clocks of 2 bytes during SPI timing. The timing and synchronization of the clock signal depends on the specific implementation and configuration of the SPI communication protocol. However, typically there is a small delay between each byte transfer in order to allow the receiving device to process the data before the next transmission. The delay can be adjusted by configuring the SPI clock frequency and SPI mode.