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Topic: ATmega168 + 20 MHz crystal, timing issues? (Read 471 times) previous topic - next topic

jnguyen327

Hey guys, I just wanted to know if I loaded a program onto the ATmega168 and then put it standalone on a breadboard with a 20 MHz crystal, will I run into timing issues? In other words, will delayMicroseconds(100) still delay for exactly 100 microseconds?

Cheater

Some things will be off. I forget which functions are affected.

jnguyen327

Okay, so I found what's different, http://www.arduino.cc/en/Hacking/OtherHardware

Can someone explain how they're different though? Will delayMicroseconds simply be off by a multiplier? How does analogRead behave differently? If I have to recompile the bootloader does that mean I have to get a programmer?

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