i/o clock speed = external crystal speed?

Projects General Guidance
1

In the ATMEGA8 data sheet under the TIMER1 Prescalars section, it talks about the system clock frequency (fclk_I/O). I was not able to find a definition of this clock. Assuming I am using a 16MHz external crystal, is this the frequency of fclk_I/O?

Thanks

2

Yes it is.

3

thanks!