Forum Discussion
SYosh17
New Contributor
New ContributorHow 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.
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.
JohnT_Altera
Regular Contributor
Regular ContributorHi,
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.
SYosh17New Contributor
New ContributorHi,
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?
