Thanks, guys- The SX95 it is then. Billy -----Original Message----- From: Jason Manley [mailto:[email protected]] Sent: Wednesday, February 01, 2012 1:15 AM To: Dan Werthimer Cc: Barott, William Chauncey; [email protected] Subject: Re: [casper] Which chip for ROACH?
I would also suggest the SX95. You're likely to run out of BRAM before anything else in most DSP-heavy CASPER applications and the LX is very low on BRAM resources. In three of the KAT-7 instruments, we run out of BRAM first, then logic and usually have spare DSP48s when using the SX95. The designs won't fit on an LX110 'cos it doesn't have enough BRAM. Jason On 01 Feb 2012, at 05:31, Dan Werthimer wrote: > > hi billy, > > the SX95T is the best Roach I chip for correlators, fft's and beamformers, > because it has a lot of DSP48 multiplier/accumulator blocks. > > the LX110T has more slices but doesn't have as many DSP blocks. > > best wishes, > > dan > > On Tue, Jan 31, 2012 at 6:27 PM, Barott, William Chauncey <[email protected]> wrote: > Hi all, > > > > I'm getting my ducks in a row for a ROACH acquisition. The wiki page lists two different possible FPGAs (SX and LX series), but most recent discussion in the threads seems to indicate that the SX95T-1FF1136C (speed grade?) is the one to get. The most recent discussion on this was some time ago as I can find in the list archive.... Has there been any change to this opinion? Any reason to get a different chip? My applications are general casper-y type apps - correlators, ffts, beamformers, etc. > > > > Thanks, > > > > Billy > > > > > >
