Impact of logic module routing flexibility on the routability of antifuse-based channelled FPGA architectures

In an antifuse based FPGA, a macro can be implemented by configuring a logic module in multiple ways. The paper evaluates the impact of the flexibility offered by these multiple layout views on the 3 main components of routability : netlength, freeway usage end maximum channel congestion. The paper presents placement and routing techniques that use the routing flexibility to enhance the routability. The paper proposes a quantitative measure of the routing flexibility and shows how it has been used to develop a routing flexibility driven synthesis approach