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???
07/10/10 17:04
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 		 #177219 - why
Responding to: ???'s previous message
this first has to be converted to the 0v-5v logic level (for which, i designed a level shifter)
WHY? HCT chips do this admirable for 3V3 level to 5V level, for 5V to 3V3 NXP, TI, .... has oodles and bunches of chips, for instance http://ics.nxp.com/products/levelshifters/all/

Erik


List of 41 messages in thread
TopicAuthorDate
Problems with GPS Receiver and the 8051            01/01/70 00:00      
   Take a step back.            01/01/70 00:00      
      Always very baudrate by measuring it            01/01/70 00:00      
      Roger that..            01/01/70 00:00      
         Noise ?            01/01/70 00:00      
         RE: Random data            01/01/70 00:00      
            Working on the hyperterminal...            01/01/70 00:00      
               Tx Rx pins            01/01/70 00:00      
                  The connections seem to be fine...            01/01/70 00:00      
                     GPS emulator            01/01/70 00:00      
                        Keil Simulator            01/01/70 00:00      
                           Great idea...            01/01/70 00:00      
                              Simulating GPS seems to work...            01/01/70 00:00      
                                 scope time            01/01/70 00:00      
                     LCD display delay problem?            01/01/70 00:00      
   Sio_poll_0.6.zip            01/01/70 00:00      
      comp.xx not nicest            01/01/70 00:00      
         Thanks Per.            01/01/70 00:00      
            Ask for suggestions how to improve the code            01/01/70 00:00      
               Good advice...            01/01/70 00:00      
      Hyperterminal works            01/01/70 00:00      
         A doubt in the datasheet...            01/01/70 00:00      
            it means that they do not know            01/01/70 00:00      
            Correct            01/01/70 00:00      
            why            01/01/70 00:00      
   Let's Do a Sanity Check            01/01/70 00:00      
      EM406            01/01/70 00:00      
      It is very weird, but...            01/01/70 00:00      
         Then is is time for....            01/01/70 00:00      
            Oscilloscpe.            01/01/70 00:00      
               Verify voltages with scope            01/01/70 00:00      
         re inversion (not) needed)            01/01/70 00:00      
      Use the simulator!            01/01/70 00:00      
         Don't really know...            01/01/70 00:00      
            Using the Keil Debugger/Simulator            01/01/70 00:00      
               Working! Now...            01/01/70 00:00      
                  Expensive solution            01/01/70 00:00      
                     True...            01/01/70 00:00      
                        SD_Card_and_DCFS16.zip            01/01/70 00:00      
                           broken link            01/01/70 00:00      
                     not all "level-converter chips" are special            01/01/70 00:00      

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