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???
08/21/06 05:31
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 		 #122674 - yield
Responding to: ???'s previous message
Richard Erlacher said:
His remark was that what costs is the package, and it makes little difference how many gates there are. I'm not sure that's true, but it seems as though the cost-per-gate goes up as the gate count goes down.


Sure, cost per gate goes down, but probably not all that much. The larger issue is that the bigger parts have a larger die, which means less dice per wafer. I'd bet the yield on the larger devices isn't perfect, so you throw away a lot when you've got bad ones.

-a



List of 70 messages in thread
TopicAuthorDate
stand alone fpga            01/01/70 00:00      
   Whose FPGA?            01/01/70 00:00      
      thanks            01/01/70 00:00      
         The answer is...            01/01/70 00:00      
            needed to hear it from the horse's mouth            01/01/70 00:00      
               Who is the horse in this instance?            01/01/70 00:00      
                  The Stallion            01/01/70 00:00      
         or if you are feeling brave..            01/01/70 00:00      
         which Altera            01/01/70 00:00      
            No Altera or Xilinix yet            01/01/70 00:00      
               the first book to teach by            01/01/70 00:00      
                  Altera development boards            01/01/70 00:00      
                     Jez, Mahmood If you want            01/01/70 00:00      
                        ive got baseband version 10.2            01/01/70 00:00      
                  Logic book            01/01/70 00:00      
                     It assumes you know about that            01/01/70 00:00      
                        Skahill's VHDL book            01/01/70 00:00      
                           Exactly!            01/01/70 00:00      
               Why not yet?            01/01/70 00:00      
                  Deadline            01/01/70 00:00      
   RTFDS            01/01/70 00:00      
      datasheet for what device?            01/01/70 00:00      
         There are "family" data sheets that are adequate            01/01/70 00:00      
      Kittens are cute, but ...            01/01/70 00:00      
         awww poor Tiddles            01/01/70 00:00      
            The best cat            01/01/70 00:00      
               ha ha didnt work            01/01/70 00:00      
                  He didn\'t do anything to stop me when...            01/01/70 00:00      
   Why oh why didn\'t the Horse tell me?            01/01/70 00:00      
      This particular horse thought you knew            01/01/70 00:00      
      This "horse" doesn't want you to notice            01/01/70 00:00      
         This horse won the race!            01/01/70 00:00      
            Every bit of it is on their website!            01/01/70 00:00      
         been there, done that            01/01/70 00:00      
            do they still make FPGA's that small?            01/01/70 00:00      
               Small FPGAs            01/01/70 00:00      
                  a colleague said, \"the gates are free\"            01/01/70 00:00      
                     maybe for small parts            01/01/70 00:00      
                        depends on where you get pricing            01/01/70 00:00      
                     yield            01/01/70 00:00      
                  small fpga---try altera acex            01/01/70 00:00      
                     What I like to compare is a 33-bit AND gate            01/01/70 00:00      
                     CycloneII is the way to go            01/01/70 00:00      
                        Well, most 805x's run at 5 Volts ...            01/01/70 00:00      
                           well, nope            01/01/70 00:00      
                              depends on how you use 'em.            01/01/70 00:00      
                                 do you read the posts or just the titles?            01/01/70 00:00      
                                    Yes, I read 'em, but that doesn't make it so ...            01/01/70 00:00      
                                       rubbish            01/01/70 00:00      
                                          Don't be so sure ...            01/01/70 00:00      
                                             ...are you?            01/01/70 00:00      
                                                we've drifted            01/01/70 00:00      
                                             FPGA usage            01/01/70 00:00      
                                 how many do you need?            01/01/70 00:00      
                           High speed logic woe            01/01/70 00:00      
                              seen them all            01/01/70 00:00      
                              FPGA clock skew            01/01/70 00:00      
                                 I agree...but            01/01/70 00:00      
                                    WOW            01/01/70 00:00      
                        yeah well            01/01/70 00:00      
               other choices            01/01/70 00:00      
                  and there's Altera's MAX-II, too            01/01/70 00:00      
                     all different manufacturers            01/01/70 00:00      
                        ah ha well portablitly yes and no,            01/01/70 00:00      
                        crawl before you walk            01/01/70 00:00      
                           I'd get the belly even closer to the floor            01/01/70 00:00      
                              the problem with them is programming            01/01/70 00:00      
                        Multibrand HDL is like multiplatform in C            01/01/70 00:00      
                        code portability            01/01/70 00:00      
      since the beginning of time            01/01/70 00:00      

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