This architecture differs from the Radix-2 Burst I/O in that the butterfly processing engine uses one shared adder/subtractor, hence reducing resources at the expense of an additional delay per butterfly calculation. Again, as with the Radix-4 and Radix-2 Burst I/O architectures, data can be simultaneously loaded and unloaded only if the output samples are in bit reversed order. This solution supports point sizes from 8 to 65536. See the following figure.
Figure 1. Radix-2 Lite Burst I/O
