I have been reading the datasheet for tiny817
And I'm a bit confused about the accuracy of the 20MHz (guess 16MHz is the same).
What is the difference (Table 34-12) between :
Accuracy with 16MHz and 20MHz Frequency Selection relative to the factory-stored frequency value
Accuracy with 16MHz and 20MHZ Frequency Selection
first is max 2% error and the other about 4% (depends) .
Have anyone measured the speed?
and next step is how accurate a number do you get when :
• SIGROW.OSC20ERR3V is the frequency error from 20MHz measured at 3V
• SIGROW.OSC20ERR5V is the frequency error from 20MHz measured at 5V
I don't really care about the speed, I just need to know how accurate time can be that way.