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???
09/28/06 00:12
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 		 #125236 - Not exactly ...
Responding to: ???'s previous message
What I mean is that I haven't seen any ARM7 parts with a 5-volt supply. That doesn't mean they don't exist.

I've not seen any ARM9/10 parts that don't require multiple (2.5 or 1.8-volt) supplies and can drive a 5-volt output. I find it VERY inconvenient to drive real-world circuitry from devices that are not 5-volt capable and can't drive at least 6 mA on those outputs. By the time I put in level shifters, buffers, etc, I have as much space as a bigger device, and as much cost, too. It's much more sensible, from where I sit, to use multiple 5-volt MCU's instead wherever possible.

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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