Honored Contributor
Honored ContributorIt seems as though the 5CSXF6 family has a slightly different pin count than the regular U23 packages. For this family, the U23 means the device has 672 pins and not 484 pins as to what the part number chart specifies. I just checked with the specific data sheets as well as the BSDL file for the device and it is indeed a 672 pin FPGA.
https://www.altera.com/support/literature/lit-dp.html https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/hb/auto/automotive_handbook.pdf https://www.altera.com/content/dam/altera-www/global/en_us/others/support/devices/bsdl/5csxfc6cu23.bsd
