XC7S6 vs iCE40UP5K
A comparison of the AMD Spartan-7 XC7S6 and the Lattice iCE40 UltraPlus iCE40UP5K using the data from both vendors' selection guides.
Side-by-side specifications
| XC7S6 | iCE40UP5K | |
|---|---|---|
| Vendor / family | AMD Spartan-7 | Lattice iCE40 UltraPlus |
| Logic (LUT4-equivalent) | 6,003 | 5,280 |
| LUTs as published | 3,752 LUT6 | 5,280 LUT4 |
| Vendor logic figure | 6,000 LC | — LC |
| DSP | 10 DSP slices | 8 16×16 MAC blocks |
| Block RAM | 0.2 Mb | 0.1 Mb |
| Large RAM | — | 1 Mb |
| Max. user I/O | 100 | 39 |
| Transceivers | None | None |
| Hard PCI Express | None | None |
| Hard processor | None | None |
| Process | 28 nm | 40 nm |
| Configuration memory | SRAM | NVCM |
| Packages | 3 | 2 |
| Design tool | AMD Vivado | Lattice Radiant |
Highlighted values are higher. Logic is compared in LUT4 equivalents; see how FPGA vendors count logic.
Key differences
The XC7S6 has about 14% more logic capacity (6K vs 5.3K LUT4 equivalents).
They use different logic architectures: the XC7S6 is built from LUT6 and the iCE40UP5K from LUT4, so the raw LUT counts (3.8K vs 5.3K) are not directly comparable.
For arithmetic, the XC7S6 has 10 DSP slices against 8 16×16 MAC blocks on the iCE40UP5K.
The iCE40UP5K has more on-chip memory (1.1 Mb vs 0.2 Mb).
Configuration memory: sram on the XC7S6, nvcm on the iCE40UP5K.
The XC7S6 is designed with AMD Vivado and the iCE40UP5K with Lattice Radiant.
Full specifications
See the complete spec sheets with packages and grades: XC7S6 (Spartan-7) and iCE40UP5K (iCE40 UltraPlus).