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???
10/13/07 09:45
Modified:
  10/13/07 09:48
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 		 #145733 - Pin Driver
Responding to: ???'s previous message
Jan Waclawek said:
It's relatively easy to generate the control signals, the devil is in the details - the high voltage power supply has to be stable with relatively heavy current pulses drawn by the EPROM under programming.

The key term for your searching is "Pin Driver"

The "Pin Driver" is the circuit in a PROM programmer that can apply the carefully-timed, carefully-controlled, high-voltage programming waveforms to the pins of the device being programmed.
Clearly, for a "unniversal" programmer, you will need a "Pin Driver" for each pin of the device to be programmed.

As Jan suggests, designing a good "Pin Driver" is a specialist area - this is what distinguishes a good PROM programmer (costing hundreds of dollars) from a cheap one...


List of 30 messages in thread
TopicAuthorDate
8052 as EPROM programmer            01/01/70 00:00      
   there's much more in an EPROM programmer...            01/01/70 00:00      
      Serial EEPROM programmer            01/01/70 00:00      
         89c51 And USB port            01/01/70 00:00      
      spesific location            01/01/70 00:00      
         try links from...            01/01/70 00:00      
            Didn't found it            01/01/70 00:00      
               two clicks away            01/01/70 00:00      
      Pin Driver            01/01/70 00:00      
         Actually ...            01/01/70 00:00      
            pin driver not necessary...            01/01/70 00:00      
               definitions ...            01/01/70 00:00      
                  To complicated            01/01/70 00:00      
                     It doesn\'t have to be complicated            01/01/70 00:00      
                        Counter address and data serial to parallel            01/01/70 00:00      
                           ... and a timer            01/01/70 00:00      
                              Software at PC is great problem            01/01/70 00:00      
                                 No PC software necessary?            01/01/70 00:00      
                                    did you had info similiar project            01/01/70 00:00      
   Which EPROM types?            01/01/70 00:00      
      For Flash...            01/01/70 00:00      
   EPROM still alive ?            01/01/70 00:00      
      Another Scrapheap Challenge?            01/01/70 00:00      
         old 27CXXX(UV Eprom)            01/01/70 00:00      
            this is what I'm talking about            01/01/70 00:00      
      yes            01/01/70 00:00      
   Did someone had info about Eprom programmer            01/01/70 00:00      
      What more do you need?            01/01/70 00:00      
   How to download the hex file into 8051.            01/01/70 00:00      
      faq            01/01/70 00:00      

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