Hi!
Could anyone explain, what are route-throughs in look up tables and why are they used? When I run the map command (xilinx) on my design, I get in the report file (design.mrp) a section:
Design Summary: Number of errors: 0 Number of warnings: 3 Number of CLBs: 124 out of 324 38% CLB Flip Flops: 81 4 input LUTs: 203 (3 used as route-throughs) 3 input LUTs: 68 (13 used as route-throughs) Number of bonded IOBs: 62 out of 144 43% IOB Flops: 0 IOB Latches: 0 Number of clock IOB pads: 1 out of 8 12% Number of primary CLKs: 1 out of 4 25% Number of startup: 1 out of 1 100%
Thanks in advance
Frank