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???
10/10/07 16:43
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 		 #145601 - The datasheet will tell you.
Responding to: ???'s previous message
The parallel port is only 5V, isn't it? Can the chip be wired directly to it without messing anything up?

The datasheet of the device in question will tell you what voltage levels the pins will tolerate.

However, emulating an UART on the parallel port will be tedious (for transmission) to next-to-impossible (for reception, if the ISP protocol requires reception).

List of 39 messages in thread
TopicAuthorDate
8051 nuts and bolts?            01/01/70 00:00      
   start here            01/01/70 00:00      
      chips            01/01/70 00:00      
         THEORETICALLY            01/01/70 00:00      
         Well            01/01/70 00:00      
            masochism            01/01/70 00:00      
               even on a desert island...            01/01/70 00:00      
               As some other members would put it ...            01/01/70 00:00      
               I rest my case            01/01/70 00:00      
                  insight            01/01/70 00:00      
                     UART ISP.            01/01/70 00:00      
                     don't forget the level convertor            01/01/70 00:00      
                        Level Converter            01/01/70 00:00      
                           Level converter            01/01/70 00:00      
                              Damage?            01/01/70 00:00      
                                 The datasheet will tell you.            01/01/70 00:00      
                              not commonly called "level converter"            01/01/70 00:00      
                                 More than just a level converter!            01/01/70 00:00      
                                    a true level converter            01/01/70 00:00      
         Programming without a computer            01/01/70 00:00      
            pdp-11's            01/01/70 00:00      
               "escalating up to their "world-class" support" fun            01/01/70 00:00      
   A Book            01/01/70 00:00      
      Good One            01/01/70 00:00      
   Bible?            01/01/70 00:00      
      technical            01/01/70 00:00      
         PC vs 8051            01/01/70 00:00      
   Whadya think about this?            01/01/70 00:00      
      no, this is for the AT89S...            01/01/70 00:00      
         FAQ            01/01/70 00:00      
            better stick to the UART-ISP version            01/01/70 00:00      
         wrapped in pink cotton and 'politically correct'            01/01/70 00:00      
            Not at all!            01/01/70 00:00      
            ATMEL?            01/01/70 00:00      
               reasons            01/01/70 00:00      
   ISP            01/01/70 00:00      
      ISP            01/01/70 00:00      
      No, but do not worry about it            01/01/70 00:00      
   RE:Programming without computer            01/01/70 00:00      

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