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Author Topic: ATmega168 + 20 MHz crystal, timing issues?  (Read 227 times)
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jnguyen327
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« on: February 22, 2008, 08:34:00 pm »
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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?
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« Reply #1 on: February 22, 2008, 09:59:32 pm »
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Some things will be off. I forget which functions are affected.
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« Reply #2 on: February 22, 2008, 11:10:42 pm »
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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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