Honored Contributor
Honored ContributorHi Lidong Fang
The Cyclone2 is absolutely powerfull anough for uClinux. I personally use the ep2c35 and I don't know how many LE's there are on the ep2c5, but I use only about 15-20% of my chip (That includes some custom peripherals, SingalTap and the Nios2f core which consumes the most LE's of all the Nios2 cores) But the rest of the configuration really depends on your application... 8mb should be enough SDRAM to run uCLinux (even 4mb will run) but depending on the application(s) you want to run on top of it I'd say go with 16MB RAM (or more). I've got a CycloneII development kit with 32MB ddr-ram and I have usually about 25MB RAM free.... I don't use the SRAM and uClinux doesn't use it so when you haven't got a custom application using it you can leave it out. The flash can be used to store your kernel, FGPA configuration AND filesystem (in that case you'll need at least 8mb) but you can also store the filesystem on an NFS drive or a CF-card in which case 4mb should be enough. A good starting point for the schematics would be one of the development kits i think... IIRC you can download them from the altera website. Greetz Walter Goossens
