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???
06/28/05 15:23
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 		 #96112 - MAX232(equivalent)
Responding to: ???'s previous message
Can I just tear apart a serial cable and wire it into the breadboard? Is it that smart or do you still need some intermediary device between the PC and the chip?
You will need a MAX232(equivalent) because the signal levels for RS232 (which the PC serial port uses) are no 0-5V, they are +-12V (or some such - RS232 is the most mutilated standard of all).
Thus you will need a RS232 transciever such as the MAX232.

Erik

List of 30 messages in thread
TopicAuthorDate
General Pulse Width Modulation on 8051            01/01/70 00:00      
   The logic seems good            01/01/70 00:00      
      How to post code            01/01/70 00:00      
      Code I'm using            01/01/70 00:00      
         Problem lies with SDCC and PSW handling.            01/01/70 00:00      
            similar "issue" with Keil?            01/01/70 00:00      
            PSW not touched in recent version            01/01/70 00:00      
               Old SDCC (ver ??) vs New SDCC (ver 2.50)            01/01/70 00:00      
                  strange            01/01/70 00:00      
                     not strange, sorry            01/01/70 00:00      
                        Still no good            01/01/70 00:00      
                           Still not strange            01/01/70 00:00      
   Alternative method            01/01/70 00:00      
   65536, not 65535            01/01/70 00:00      
      Caught that errror            01/01/70 00:00      
         why not use the PCA, it is made for this            01/01/70 00:00      
            No PCA available            01/01/70 00:00      
               slim PICkins            01/01/70 00:00      
               go ahead, spend $7            01/01/70 00:00      
                  Why not read 8051 stuff?            01/01/70 00:00      
                     Excellent - Thanks            01/01/70 00:00      
                  Atmel Flip            01/01/70 00:00      
                     MAX232(equivalent)            01/01/70 00:00      
                        Another Option            01/01/70 00:00      
                     level convertor            01/01/70 00:00      
                        aka "Transceiver"            01/01/70 00:00      
         JSIM.EXE is all you need and it FREE.            01/01/70 00:00      
   Still not strange            01/01/70 00:00      
   Follow Up to the original post            01/01/70 00:00      
      Dumb and dumberrer            01/01/70 00:00      

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