Hi,
2) start a high speed crystal so everything else goes fast.
without a quartz you have approx. 4,8 MHz at 3.0 V from the DCO (checked with toggling a port and an oscilloscope) and if you don´t overclock you can take only an 8 MHz quartz (which is stable overclocking at only 3 V) - the difference is not huge.
Regards Rolf F.
