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???
12/03/04 15:58
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#82469 - Reply to Erik
Responding to: ???'s previous message
If you look up the definition of half duplex it doesn't mention any control signals. Those are part of RS485 rather than part of half duplex.

As long as you assume Flash Magic is in control of the communications during ISP and only one device on the half duplex bus is responding, then it can perform ISP over a half-duplex bus. The control signals are another matter. :)


List of 26 messages in thread
TopicAuthorDate
RS485 Contention.            01/01/70 00:00      
   485 ISP            01/01/70 00:00      
      RS485 'U' & ISP            01/01/70 00:00      
         the crux            01/01/70 00:00      
            Flashmagic !!!!            01/01/70 00:00      
            RS485 contention            01/01/70 00:00      
            Cygnal F12x            01/01/70 00:00      
            Reply to Erik            01/01/70 00:00      
               FM< half duplex            01/01/70 00:00      
                  Reply to Erik            01/01/70 00:00      
                     bus direction            01/01/70 00:00      
                        A few comments            01/01/70 00:00      
                           comnments on comments            01/01/70 00:00      
                              comments^3            01/01/70 00:00      
                                 boot NIT            01/01/70 00:00      
                                    An example worth 3E8h words :-)            01/01/70 00:00      
            A fundamental query - Erik            01/01/70 00:00      
               testing            01/01/70 00:00      
   RS 485 Contention            01/01/70 00:00      
      RS485 Contention            01/01/70 00:00      
   Switch ?            01/01/70 00:00      
      RS485 contention            01/01/70 00:00      
   Possible solutions.            01/01/70 00:00      
   Thanks Erik.            01/01/70 00:00      
   SOLUTION            01/01/70 00:00      
      Thanks but thats not the solution            01/01/70 00:00      

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