INPUT_PULLUP on atmega 328p standalone

Hey! When using the arduino I know that input_pullup is ok but if I use standalone circuit with INPUT_PULLUP on atmega 328p. Is that ok? Is the internal resistor in the atmega chip or the arduino uno board?

They are inside the Atmega, not on the board. Have a careful look at the board and try to find the resistors.

PerryBebbington:
They are inside the Atmega, not on the board. Have a careful look at the board and try to find the resistors.

Thanks Perry!

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