ice40

Lattice / SiliconBlue iCE40 FPGAs

• devices - iCE40 FPGA devices. The devices architecture descriptions have approximations of the real fabric, to get real fabric you have to override the rr_graph.xml file.

  • devices/layouts - Tile layout descriptions for devices.

  • devices/tile-routing-virt - Version of architecture which uses;

    • Local tracks inside a tile.
    • Fake fabric which "approximates" the real fabric inside the iCE40.

  • devices/top-routing-virt - Version of architecture which uses;

    • Local tracks at rr_graph level.
    • Fake fabric which "approximates" the real fabric inside the iCE40.

• primitives/ - The primitives that make up the iCE40. These are generally used inside the tiles.

• tiles/ - The tiles found in the iCE40 architecture. The iCE40 only really have 3 tile types,

  • tiles/plb - Logic tiles, called PLBs
  • tiles/pio - IO tiles, called PIOs
  • tiles/block_ram - Block Ram tiles, which don't really have a name.

Status

• BELs
  • LUT+FF
    • LUT
    • FF modes (need to test all modes)
    • Carry chains
  • IO
    • Simple Input
    • Simple Output
    • Tri-state
    • LVDS
    • Global Buffer
  • RAM40_4K
  • DSP
  • PLL
  • iCEGATE
  • Warmboot
• Routing
  • ColBuf (currently all are turned on)
  • Global
  • Negihborhood
• Timing
  • BEL
  • Routing