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Jim Granville
03/13/13 15:06
Read: 961 times

#189565 - as always, it depends
Responding to: Erik Malund's previous message
Erik Malund said:

I believe that for hardware I²C implementations the requirement to specify a slave clock frequency is superfluous.

You do not usually need to specify an operate speed, but it is common to specify a maximum speed, and there, that can be lower than one might think.
I recall a Philips part that used a 455KHz ceramic resonator, and somehow they manged to get that into the slave SPI Hardware, such that the i2c was unreliable above ~75KHz, so the part failed to meet even Philips lowest speed specs...

List of 6 messages in thread
I think I'm right, but ....      Erik Malund      03/13/13 08:47      
   as always, it depends      Jim Granville      03/13/13 15:06      
      not the driving clock but ....      Erik Malund      03/13/13 16:04      
         yes,,,      Jim Granville      03/13/13 16:46      
   Specifying a slave clock      Oliver Sedlacek      03/18/13 06:35      
      if you could ...      Erik Malund      03/18/13 11:07      

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