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05/01/07 11:08
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#138363 - i2c - hardware
Hello Forum

Drafting on a new 8051 design, i wondered how much "protection" thats needed for i2c to work proper.

Normaly, ill have a 4k7 resistor pull up with two small diodes as protection on each line, and then each line filtered on each device with a small - 330 ohm - series resistor. The pull up must be there, but how much of the rest do YOU implement in your design?

This is not kitchen table construction; it will recide in a low EMC industrial enviroment, but it must work 24/7/365.

How do you do it?

Any comments apreachiated

Per

List of 12 messages in thread
TopicAuthorDate
i2c - hardware            01/01/70 00:00      
   More information needed Eg Distance            01/01/70 00:00      
      Re: more information            01/01/70 00:00      
         I'd add none            01/01/70 00:00      
   Dosn't work on 29 February, then?            01/01/70 00:00      
      one day off            01/01/70 00:00      
         I2c Pullup\'s            01/01/70 00:00      
            Thanx            01/01/70 00:00      
            All this can be ignored, if you use chips with har            01/01/70 00:00      
               Yes, I2c hardware on board is desired            01/01/70 00:00      
                  language?            01/01/70 00:00      
                     on-board ..I mean on-chip            01/01/70 00:00      

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