SLG47920 vs iCE40LM4K
A comparison of the Renesas ForgeFPGA SLG47920 and the Lattice iCE40 LP/HX/LM iCE40LM4K using the data from both vendors' selection guides.
Side-by-side specifications
| SLG47920 | iCE40LM4K | |
|---|---|---|
| Vendor / family | Renesas ForgeFPGA | Lattice iCE40 LP/HX/LM |
| LUTs as published | 2,240 LUT5 | 3,520 LUT4 |
| LUT type | 5-input look-up table | 4-input look-up table |
| LUT4 equivalent (approx.) | ≈2,912 | ≈3,520 |
| CoreScore (SERV cores) | — | — |
| Vendor logic figure | — | 3,520 LC |
| DSP | — DSP blocks | — 16×16 MAC blocks |
| Block RAM | 0.1 Mb | 0.1 Mb |
| Large RAM | — | — |
| Max. user I/O | 32 | 39 |
| Transceivers | None | None |
| Hard PCI Express | None | None |
| Hard processor | None | None |
| Process | — | 40 nm |
| Configuration memory | Non-volatile (OTP) or SPI flash | NVCM or SRAM |
| Packages | 1 | 3 |
| Design tool | Renesas Go Configure Software Hub | Lattice iCEcube2 |
Highlighted values are higher. LUT counts are shown as published; the LUT4 equivalent is an approximation to compare different LUT types, see how FPGA vendors count logic. Add up to two more devices to this comparison.
Key differences
The iCE40LM4K has about 21% more logic capacity (3.5K vs 2.9K LUT4 equivalents).
They use different logic architectures: the SLG47920 is built from LUT5 and the iCE40LM4K from LUT4, so the raw LUT counts (2.2K vs 3.5K) are not directly comparable.
The iCE40LM4K has more on-chip memory (0.1 Mb vs 0.1 Mb).
Configuration memory: non-volatile (otp) or spi flash on the SLG47920, nvcm or sram on the iCE40LM4K.
The SLG47920 is designed with Renesas Go Configure Software Hub and the iCE40LM4K with Lattice iCEcube2.
Full specifications
See the complete spec sheets with packages and grades: SLG47920 (ForgeFPGA) and iCE40LM4K (iCE40 LP/HX/LM).