The serial peripheral interface (SPI) is one of the most widely used interfaces between microcontroller and peripheral ICs such as sensors, ADCs, DACs, shift registers, SRAM, and others.

SPI to AXI4-Lite Bridge An SPI to AXI4-lite bridge for accessing AXI4-lite register banks, such as the ones generated by airhdl.com, over a serial peripheral interface (SPI).