A few observations.
On the title page of ATMega8 datasheet everybody can read "Fully Static Operation" typed by bold font among features of the device.
On the p. 30 of the same document everybody can read another text typed by an ordinal font:
"When applying an external clock, it is required to avoid sudden changes in the applied clock frequency to ensure stable operation of the MCU. A variation in frequency of more than 2% from one clock cycle to the next can lead to unpredictable behaviour. It is required to ensure that the MCU is kept in Reset during such changes in the clock
Is there anybody who can explain me how the statemens can agree? For me the statement on the title page seems to be false advertising.
And another observation. Early ATMega128 datasheets has no such restriction but the last I have downloaded today has it. Anybody knows why the restriction was added?
Another question. Why nearly all ATMega datasheets on http://www.atmel.com/atmel/produ... are Preliminary for a few years (even "Not Recommended for New Designs")?
Is Atmel a stable company now?