USB on Arduino question

[maormat4]

usb on arduino question

HI GUYS,

In the arduino uno schematic why i cant just plug the usb d+ and d- stright to the atmega8? why i need an additional ic for that?

Thank you

 

[andre_luis]

Re: usb on arduino question

The "additional" IC acts as an USB/UART converter, a peripheral not available built-in at Atmega8 microcontroller.

 

[maormat4]

Re: usb on arduino question

Thanks man, and if i use usb 3.0 that has rx and tx i can connect it directly?

 

[rho-bot]

Re: usb on arduino question

Kidding?
No, you can't.
USB3.0 uses 2 unidirectional differential pairs, therefore they call them RX & TX.
USB has nothing in common with UART.

 

[filip.amator]

Re: usb on arduino question

No, you can't because ATmega8 is too small and too slow to handle usb 3.0 data transfers. It is really simple mcu with low resources and low computing power.