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???
06/17/06 19:44
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 		 #118482 - Why the 8255 ?
Responding to: ???'s previous message
The 8255 is not the best way to proceed, the chip is getting hard to find, its quirky and slow - there are better, more I/O methods, like using shift register methods for Input and output. The shift methods are virtually unlimted in output and input.

I really suggest that you should review your needs.

Steve

List of 30 messages in thread
TopicAuthorDate
can P0 of c51input/output at same time            01/01/70 00:00      
   Why the 8255 ?            01/01/70 00:00      
      how to interface 8155            01/01/70 00:00      
         what does that have to do with this thread ?            01/01/70 00:00      
         Clearly, you should read the datasheet(s)            01/01/70 00:00      
   input/output            01/01/70 00:00      
      That's a very good put it!            01/01/70 00:00      
   Hints...            01/01/70 00:00      
      is 8255 really a bad idea???            01/01/70 00:00      
         Maybe            01/01/70 00:00      
            possibilities            01/01/70 00:00      
         Depends on your actual needs            01/01/70 00:00      
         Have you really considered the economics?            01/01/70 00:00      
            not all of us            01/01/70 00:00      
               the REAL question is ...            01/01/70 00:00      
                  answers            01/01/70 00:00      
                  8255 main drawback            01/01/70 00:00      
      Sorry, wrong link!            01/01/70 00:00      
      74HC595            01/01/70 00:00      
         As long as we must guess...            01/01/70 00:00      
            a little correction kai            01/01/70 00:00      
   Serial I/O Expanders            01/01/70 00:00      
      laser diodes/ldr sensors            01/01/70 00:00      
         Inductive loops            01/01/70 00:00      
            need little more info on inductive loop            01/01/70 00:00      
               Inductive loop            01/01/70 00:00      
                  basically an inductive loop is the same            01/01/70 00:00      
   I2C I/O expander            01/01/70 00:00      
      echo            01/01/70 00:00      
   60LEDs: MAX7219            01/01/70 00:00      

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