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???
04/08/08 16:54
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 		 #153029 - No programmer needed.
Responding to: ???'s previous message
You normally use FLIP to program the AT89C5131. The only hardware required is to have a PSEN and RST push-buttons to force the USB bootloader. I do not know what you mean by a home made PC programmer.

I have an early 5131 which only has USB bootloader. As far as I know, you cannot use RS232 to do the bootload. But it may be that later chips have a dual boot mechanism.

The first stage is to make sure you have the correct USB driver installed with FLIP. My version number is a lot more recent than yours.

Look at reference designs especially the voltage levels and D+ D- pullups / pulldowns around the USB socket. And use the proper crystals.

David.

List of 27 messages in thread
TopicAuthorDate
usb driver to use at89c5131            01/01/70 00:00      
   AT89C5131 recognised by FLIP            01/01/70 00:00      
      No recognized yet. "Help please"            01/01/70 00:00      
         No programmer needed.            01/01/70 00:00      
            I just remember            01/01/70 00:00      
            hardware contition            01/01/70 00:00      
               USB device driver            01/01/70 00:00      
            schematic            01/01/70 00:00      
               Email schematic            01/01/70 00:00      
         Did you apply 5V to a 3.3V part?            01/01/70 00:00      
            AT89C5131A-S3SUM-ND is 2.7V - 5.5V            01/01/70 00:00      
               AT89C5131A-UM            01/01/70 00:00      
   Device Manager            01/01/70 00:00      
      Use driver that comes with your FLIP 3.3.1            01/01/70 00:00      
         USB Driver            01/01/70 00:00      
            Try again.            01/01/70 00:00      
               It is finished!            01/01/70 00:00      
                  Pleased that everything works OK now.            01/01/70 00:00      
                     Extended Range            01/01/70 00:00      
                        My AT89C5131-IL does not do correct Vref            01/01/70 00:00      
                           I guess you are led astary or confused            01/01/70 00:00      
                              Thanks Eric. That explains it.            01/01/70 00:00      
   AT89C51RC2 Bootloader process            01/01/70 00:00      
      Just check the box in FLIP            01/01/70 00:00      
         I have already done it            01/01/70 00:00      
            That is what it is supposed to do. Flip manual            01/01/70 00:00      
               Ok            01/01/70 00:00      

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