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???
08/10/08 12:49
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 		 #157373 - ... and HOPE
Responding to: ???'s previous message
build your own parallel port ISP programmer for 89S51/2 micro ... and HOPE.

I believe that the most often seen thread is "why does my programmer for 89S51/2 micro that I built not work"

Get what Michael recommended (I'd spend a few more bucks and go with the '120) or get a chip, programmable through the UART such as P89V51RD2.

Erik



List of 34 messages in thread
TopicAuthorDate
Programming 8051/8052            01/01/70 00:00      
   Get something ready to do to start...            01/01/70 00:00      
   here's a simple ISP cable for 89S51/2            01/01/70 00:00      
      ... and HOPE            01/01/70 00:00      
    or DS89C450            01/01/70 00:00      
      Not the fastest by 3::1            01/01/70 00:00      
         There are features ...            01/01/70 00:00      
            Pray explain            01/01/70 00:00      
               Some features really DO help            01/01/70 00:00      
                  why fiddle with MODE 0            01/01/70 00:00      
                     There aren't many reasons, but SPI isn't one            01/01/70 00:00      
                        you are describing SPI            01/01/70 00:00      
                           Have a look!            01/01/70 00:00      
                              luvverly !            01/01/70 00:00      
                                 ... and what I really like ...            01/01/70 00:00      
                                    nope            01/01/70 00:00      
                                       You missed a thing or two, Erik            01/01/70 00:00      
    i edit my answer as            01/01/70 00:00      
   AT89S5X or DS89C450MNG            01/01/70 00:00      
   Back to Topic-here is what I tried for days..            01/01/70 00:00      
      two mistakes            01/01/70 00:00      
      Logic Low Levels?            01/01/70 00:00      
      please consider            01/01/70 00:00      
         Abt ISP cable ang voltage level            01/01/70 00:00      
            That how most of these posts go            01/01/70 00:00      
               schematics at last!            01/01/70 00:00      
                  no, the frequency does not matter            01/01/70 00:00      
            Maybe a helpful link            01/01/70 00:00      
            Where you measure the voltage makes a difference            01/01/70 00:00      
               ISP Schematics at last!            01/01/70 00:00      
                  Keep your work clean and wires short            01/01/70 00:00      
                  See if this suits you...            01/01/70 00:00      
      EA pin should be high            01/01/70 00:00      
         EA high not necessary during ISP            01/01/70 00:00      

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