Hello, Cyclone V SoC has both processor system (HPS) and the FPGA logic, and they can be used independently. As such, it should be sufficient to cover FPGA logic usage scenarios in Cyclone IV, except for the following cases:
- DE2-115 has total logic element (LE) of 115K, whereas certain Cyclone V SoC board (for example DE1-SoC) has only 85K of LE. If you have designs that require >100K LE (very rarely) then it won't fit in DE1-SoC
- Some Cyclone V SoC boards have resources like USB, Ethernet, UART on the HPS side, which means if you need these peripherals you will need to bring the HPS up. DE2 meanwhile doesn't have HPS so all the peripherals are on the FPGA side.
- Certain IP are different on Cyclone V vs Cyclone IV. If I am not mistaken, one example is that the PLL IP used in Cyclone V is of a different name compared to the one used in Cyclone IV. Thus you may have to figure out some of them manually (not too difficult)
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