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TM4c1294 Clamping diodes

Dear TI,

I would like to make a universal slow, Digital In on my PCB for 3V to 30V. Is it sufficient to just use a big input resistor (47k) and let the internal clamping diodes in the tm4c handle the high voltage? 

  1. Are the clamping diodes capable to handle the 30V?
  2. Are they capable to handle 700uA?

thanks in advance.

Chris