Arduino Mega2560 R3 microcontroller

Hi,

I am new to Arduino, so if this question seems stupid, I'm sorry. I want to use Atmel Flip to update my Mega 2560 R3's chip (with this guide: https://www.arduino.cc/en/Hacking/DFUProgramming8U2). When I opened Flip, it asked me what the chip was. Is it ATmega8u2 or ATmega16u2?

Thanks in advance,

rainy_day

(deleted)

what do you mean

oh the tiny square one by the usb type b port? Thanks so much it says 16u2