ATmega168 Subsystem Diagrams

About These Diagrams

These diagrams are probably not completely accurate.   I generate one of these diagrams each time I begin to investigate the operation of a particular microcomputer subsystem and I modify it as I gain experience with the subsystem.   I would appreciate any corrections or suggestions that you might have to offer.

All of these diagrams are probably suitable for most of the ATmega devices regardless of the device number (if any) in the title.   I am removing specific device numbers from the titles as I revise the diagrams.


ATmega168 External Interrupts

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ATmega168 Pin Change Interrupts

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Timer/Counter0 Overflow

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Timer/Counter0 Compare Match A

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Timer/Counter1 Compare Match A

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Timer/Counter1 Compare Match B

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Timer/Counter2 Overflow

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Timer/Counter2 Compare Match A

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Timer/Counter2 Compare Match B

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ATmega168 USART0

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ATmega168 Analog to Digital Converter

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