Electronic – How to read Map-Report in FPGA Synthesis Tools

fpgalatticesynthesis

I have this Map-Report piece product by Lattice Diamond:

...
 Number of SLICEs:  9609 out of 33264 (29%)
    SLICEs(logic/ROM):  8814 out of 26460 (33%)
    SLICEs(logic/ROM/RAM):  795 out of 6804 (12%)
         As RAM:  795 out of 6804 (12%)
         As Logic/ROM:  0 out of 6804 (0%)
....

I already know what means the first line (Number of SLICEs), but I can't figure out what the rest means; can someone explain precisely the difference between SLICEs(logic/ROM) and SLICEs(logic/ROM/RAM)?

I have downloaded dozens of manual, but where can I find more info about all the other report voices?

Best Answer

These are defined in details in the document:

LatticeXP2 Family Data Sheet

If you go down to "Table 2-1. Resources and Modes Available per Slice" you will find the detailed description of how these slices are used and what kind of terminology they use when reporting the usage of them.

Let me know if this is OK, or I add more data to the answer to clarify it further

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