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???
06/18/05 07:52
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#95250 - Cart Before Horse
Responding to: ???'s previous message
Muhammad Naeem said:
Basically I am using 7 slave for expansion of IO pins.

Sounds like a classic case of CBHS (Cart Before Horse Syndrome).

Why don't you just choose a processor that's appropriate to your requirements (ie, enough IO) rather than messing about with one that clearly doesn't fit your requirements (not enough IO; only one UART)?

http://www.8052.com/forum/read.phtml?id=95129

List of 24 messages in thread
TopicAuthorDate
One 89c51 Master and 7 Slaves            01/01/70 00:00      
   Multiple 8051s communication            01/01/70 00:00      
      Standard IO expender            01/01/70 00:00      
         try 74xx273            01/01/70 00:00      
   Try parallel comm,            01/01/70 00:00      
      Defeating the object?            01/01/70 00:00      
      Parallel communnication            01/01/70 00:00      
   expand the i/o            01/01/70 00:00      
   Cart Before Horse            01/01/70 00:00      
   Why not HC595?            01/01/70 00:00      
   questions            01/01/70 00:00      
      Answer            01/01/70 00:00      
         From CBHS to STPC            01/01/70 00:00      
         textile machine ...            01/01/70 00:00      
         You're never too old to learn            01/01/70 00:00      
         RS-485??            01/01/70 00:00      
         CAN??            01/01/70 00:00      
   the most I ever drove            01/01/70 00:00      
   For io expenssion            01/01/70 00:00      
      Big Box            01/01/70 00:00      
      The best:            01/01/70 00:00      
         Maxim            01/01/70 00:00      
         explain,what calculation            01/01/70 00:00      
            Hmmmm....            01/01/70 00:00      

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