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???
09/30/06 16:30
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 		 #125439 - Sandeep Gupta must be a manager
Responding to: ???'s previous message
No engineer would approach this issue as the O/P has done.

No justification for anything. Just a bunch of assumptions.

Why even consider an expensive (per seat) tool like the KEIL compiler, for example, before thorough evaluation of the no-cost/low-cost tools available? Further, why jump right into the assumption that a larger MCU is needed before making a thorough assessment of requirements? Additionally, most of the IC's mentioned are available in 3V3 versions. I know there are op-amp's that will work in that realm, and, further, there are higher-voltage supplies availbale if you use the MAX3232 which is the 3V3 version of the Max232, provided you stick with CMOS.

As for the OS, there's been a free LINUX version available with each ARM I've used. That has ample tools available.

It's never trivial changing from one MCU to another. Modifying the architecture will require some real analysis before any design can be undertaken.

Deciding on a new MCU now looks to me like putting the cart before the horse.

RE


List of 46 messages in thread
TopicAuthorDate
what next after 8051?            01/01/70 00:00      
   Should be in Chat!            01/01/70 00:00      
      ARM7            01/01/70 00:00      
         not 5-volts!            01/01/70 00:00      
            not 5 volts?            01/01/70 00:00      
               Not exactly ...            01/01/70 00:00      
                  "real-world" or "old-world"?            01/01/70 00:00      
                     can't deny it ...            01/01/70 00:00      
      chat            01/01/70 00:00      
         No, not that chat!            01/01/70 00:00      
   DS80C390            01/01/70 00:00      
   Current processor?            01/01/70 00:00      
      after 8051            01/01/70 00:00      
         Nothing to do with ARM            01/01/70 00:00      
         Why 8051?            01/01/70 00:00      
            Crystal            01/01/70 00:00      
            Crystal            01/01/70 00:00      
               You didn't answer the question!            01/01/70 00:00      
                  some thoughts            01/01/70 00:00      
                     Needs more thought!            01/01/70 00:00      
               you say you need performance, are you even thin            01/01/70 00:00      
                  only 20MHz in the 6-clock mode            01/01/70 00:00      
                     only 20MHz in the 6-clock mode            01/01/70 00:00      
                        yeah...            01/01/70 00:00      
                           not QUITE hopeless            01/01/70 00:00      
                        the whole thread seems a waste of effort            01/01/70 00:00      
                           Understatement!            01/01/70 00:00      
         you might want to stick to '51... or not...            01/01/70 00:00      
         Why that crystal frequency?            01/01/70 00:00      
   that is SOME design            01/01/70 00:00      
      Strange Design            01/01/70 00:00      
         an example            01/01/70 00:00      
            bugger..            01/01/70 00:00      
               They had an 8-pin and a 14-pin PIC, didn't they?            01/01/70 00:00      
   ALL of the above is a pie in the sky            01/01/70 00:00      
      Maybe it is for a PABX?            01/01/70 00:00      
      DS80C390            01/01/70 00:00      
         I thought that, too. Why dig deeper?            01/01/70 00:00      
            What does Sandeep Gupta say?            01/01/70 00:00      
               8051 >>> ARM            01/01/70 00:00      
                  Look at the code before changing cpu            01/01/70 00:00      
                  Sandeep Gupta must be a manager            01/01/70 00:00      
                     Blinded by the problem            01/01/70 00:00      
      5V ARM            01/01/70 00:00      
         Well, that's interesting!            01/01/70 00:00      
   have you considered a multiprocessor            01/01/70 00:00      

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