ATMEL
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ATmega168PA Atmel Microcontroller Data Sheet
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ATmega168A Atmel Microcontroller Data Sheet
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ATmega88PA Atmel Microcontroller Data Sheet
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ATmega88A Atmel Microcontroller Data Sheet
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ATmega48PA Atmel Microcontroller Data Sheet
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ATmega48A Atmel Microcontroller Data Sheet
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0856C ATMEL AVR Instruction Set Data Sheet