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???
12/23/04 10:36
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 		 #83692 - uPSD 3xxx not really suitable
Responding to: ???'s previous message
Strangely enough, I was pointed to these devices by a colleague yesterday, too.
While yes, some of these devices have 32kB RAM and the 33xx series has a fast 4clock core with prefetch etc.; to configure up the device is really not a simple task. We have used a PSD8xx in a project before together with a 8052, and it was not trivial at all to set it up working. As the uPSD is virtually the same as a standard '52+PSD setup, the task is not easier and really not too suitable for a hobby project.
Nevertheless, I still consider them to be great parts and a good option for more complex projects (we have samples of uPSD3212 around but had no time yet to try them - in replacing the mentioned '52+PSD combination, sparing money on parts, board space, handling and programming).
And it is possible to set part of the FLASH as code memory and part as data memory, which makes it a very similar to the stnadrd setup, needing virtually no modification of the original BASIC52 except the FLASH programming. And the FLASH is erased in big blocks so the "programming directly in FLASH" feature cannot be used.
Therefore I decided not to go for these devices.

Jan Waclawek


List of 30 messages in thread
TopicAuthorDate
Basic52            01/01/70 00:00      
   I remember that            01/01/70 00:00      
      Fullscreen editor            01/01/70 00:00      
         ...and in a full circle            01/01/70 00:00      
            Of course.            01/01/70 00:00      
         Line numbers and editors            01/01/70 00:00      
         MSX micros            01/01/70 00:00      
         BASIC with no line numbers            01/01/70 00:00      
            Impressive!            01/01/70 00:00      
               Line number-less BASIC            01/01/70 00:00      
                  labels?            01/01/70 00:00      
            still don' know how            01/01/70 00:00      
               Look to VB            01/01/70 00:00      
               No line numbers example            01/01/70 00:00      
                  Now this is clear.            01/01/70 00:00      
   A little Christmas gift            01/01/70 00:00      
      Basic52. Thank you.            01/01/70 00:00      
         it would, if            01/01/70 00:00      
            Take it as a toy.            01/01/70 00:00      
            Simulator and IDE too ?            01/01/70 00:00      
   Nice job !            01/01/70 00:00      
      Data limited, not code            01/01/70 00:00      
         Philips Flash write            01/01/70 00:00      
            Re: Philips Flash write            01/01/70 00:00      
               Internal XRAM            01/01/70 00:00      
                  Re: Internal RAM            01/01/70 00:00      
                     More Internal XRAM            01/01/70 00:00      
                        uPSD 3xxx not really suitable            01/01/70 00:00      
                           uPSD 3xxx            01/01/70 00:00      
                     superseed, not obsolete            01/01/70 00:00      

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