Sure, if you replace the Resonator.
Then you need to set the CPU fuses for the correct frequency
And you need a 20mhz 644p profile for arduino..
Then recompile your sources (which may or may not work for the baud rates on the new freq... depends how it was written)
All for 4 more mhz which will be used waiting for data over the slow serial lines...
Then you need to set the CPU fuses for the correct frequency
And you need a 20mhz 644p profile for arduino..
Then recompile your sources (which may or may not work for the baud rates on the new freq... depends how it was written)
All for 4 more mhz which will be used waiting for data over the slow serial lines...