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[AVR] 4*4 Keypad Interfacing with AVR microcontroller

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ketanrathod

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I am interfacing keyapd with ATmega32. But I have only 4 pins of PORT A are remaining. How I should
I interface it . Please suggest me the code.
 

You need an encoder to reduce the pin requirement. This encoder is one example of reducing the pin counts. You have to find one that suitable for your design. All the best.
 

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