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nRF51 dongle Arduino / ATmega AVR with TWI ANT

I have a few nRF51 dongles I wish to use with ANT+ for wireless mesh communication between some robots. I want to connect each to one ATmega 1284p and another Arduino Mega with ATmega 2560, both 5v chips. Can I connect them directly to the GPIO edge pins to interface with TWI or will it destroy the nRF chip?

Edit; www.nordicsemi.com/.../nRF51-Dongle

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