The AXI protocol defines three burst types:
FIXED - In a fixed burst:
• The address is the same for every transfer in the burst.
• The byte lanes that are valid are constant for all beats in the burst. However, within those byte
lanes, the actual bytes that have WSTRB asserted can differ for each beat in the burst.
This burst type is used for repeated accesses to the same location such as when loading or emptying FIFO.