Posted: Mon Feb 23, 2009 12:21 am Post subject: high frequency by atmega 128?
We drive a atmega128 with 16MHz ext. crystal and need a 7MHz signal from timer0 or timer1, but the maximum frequency is 2MHz. what's the problem?
Thanks
->((dashtesobh@gmail.com)))
There isn't a problem with the AVR... it isn't possible to generate a 7MHz output from the AVR running at 16MHz - see the datasheet sections on system clock options and the timer clock generators.
You will need a separate crystal oscillator or some kind of PLL/DDS clock generator to get a 7MHz signal. _________________ If all else fails, read the manual. Even better: read the manual before something fails. If you can't find it in the manual, search the forum.
BascomAVR 2.0.8.5
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