If the AXI4-Lite interface is chosen, all the registers including the SPI DTR and SPI DRR are 32-bit, single-access registers. The SPI DTR and SPI DRR registers have only 8 valid bits out of 32.
If the AXI4-Lite interface is chosen, all the registers including the SPI DTR and SPI DRR are 32-bit, single-access registers. The SPI DTR and SPI DRR registers have only 8 valid bits out of 32.