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Jez Smith
05/20/12 12:44
Read: 511 times
Birmingham
England


 
#187448 - Those are actually PALs not CPLDs
Responding to: Jason Arkwright's previous message
You would need a device with 2048 registers to form a 256x8 prom and then you need extra registers for the counter/control and so on so you would be looking at a larger device from the likes of altera or xilinx.
Once you get into devices that are that large then you might as well start looking at FPGAs with block RAM which could be used to emulate the prom.Its probably not economic unless you implement the entire system as a DDS device in a FPGA


List of 24 messages in thread
TopicAuthorDate
256bit x 8 proms      Jason Arkwright      05/15/12 04:44      
   What frequency Sine wave & Clock ?      Jim Granville      05/15/12 05:37      
      Thank you      Jason Arkwright      05/15/12 08:10      
         DDS (Direct Digital Synthesis)      Jim Granville      05/15/12 17:49      
         digital sine wave      Andy Peters      05/16/12 21:24      
            uC sine generator      Jason Arkwright      05/17/12 04:36      
               DMA      Aubrey Kagan      05/17/12 06:43      
               neither do I      Erik Malund      05/17/12 07:07      
                  ARN      Michael Karas      05/17/12 15:30      
                  'F120 Series      Michael Karas      05/17/12 15:58      
               Other solutions      Jim Granville      05/17/12 20:12      
               150nS access time is so long      Justin Fontes      05/17/12 22:13      
            is that realy the case?      Richard Erlacher      05/23/12 16:21      
   Of course my solution      Jez Smith      05/19/12 09:11      
      Hmmm.., nice but...      Jason Arkwright      05/20/12 12:29      
         Those are actually PALs not CPLDs      Jez Smith      05/20/12 12:44      
         ATF750CL for PT clocks      Jim Granville      05/20/12 16:38      
            ATF750      Jason Arkwright      05/21/12 09:21      
               ATF750C ?      Jim Granville      05/22/12 23:42      
                  Yes, Jim You are exactly right.      Jason Arkwright      05/26/12 12:49      
                     Can I suggest      Jez Smith      05/26/12 14:00      
                     ATDH1150USB      Jim Granville      05/26/12 19:45      
                        Update : ATDH1150VPC      Jim Granville      05/27/12 05:57      
                        Thanks JIM      Jason Arkwright      05/31/12 15:57      

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