How can I use the LUT chain interconnect? - How can I use the LUT chain interconnect? I want to create 6-input NAND gate using the LUT chain interconnect. How can I use the LUT chain interconnect? I'm using Cyclone IV. Replies: Re: How can I use the LUT chain interconnect? I got it. Thank you very much! Replies: Re: How can I use the LUT chain interconnect? Hi, If you look into https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-iv/cyiv-51002.pdf , the carry chain can only be used in Arithmetic mode. So it is not possible to implemented using NAND gate. Replies: Re: How can I use the LUT chain interconnect? Hi, Thank you for answering. I implement very simple example of 6-input NAND. The place and route result of this design using 2 LE, which placed different LAB. I think it does not use LUT chain interconnect. I attached the project files. Is there any example using LUT chain interconnect? Replies: Re: How can I use the LUT chain interconnect? Hi, When you implement your design (6-Input NAND gate) it will directly optimize the design and use LUT chain interconnect when necessary. There is no way to manually implement it.