[AVR] how to interface ATXMEGA64B1 with USB for programming using bootloader?

[Mandar Joshi]

I want to use USB for ATXMEGA64B1 programming using bootloader but at controller side I want to use micro USB B type connector for it. Is it possible to do so?
Has anyone tried this before, because I searched it on internet but couldn't get that much help. It would be helpful if anyone could give me example of it.

 

[FenTrac]

The Atmel application note below talks about using the USB bootloader.

http://www.atmel.com/Images/doc8429.pdf

 

[Mandar Joshi]

I have read that document, it doesn't give any idea about h/w connections. I am not getting how to make hardware connections between micro USB B type connector and ATXMEGA64B1.

 

[very question]

Hi
this maybe help you

 

[FenTrac]

Pins 12 and 13 of the ATxmega64 are D- and D+ respectively, according to the datasheet.
I think that one could use the schematics for an arduino with the ATmega16U2 chip USB interface, as an example of connections of D- and D+ between the microcontroller and the connector. I have followed those schematics to build a usb to ttl converter using the 16u2.
Wikipedia, I notice, shows the pin assignments for the micro USB B connector in their USB article.

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Pins 12 and 13 of the ATxmega64 are D- and D+ respectively, according to the datasheet.
I think that one could use the schematics for an arduino with the ATmega16U2 chip USB interface, as an example of connections of D- and D+ between the microcontroller and the connector. I have followed those schematics to build a usb to ttl converter using the 16u2.
Wikipedia, I notice, shows the pin assignments for the micro USB B connector in their USB article.

 

[Mandar Joshi]

Thank you FenTrac and very question. So very question in case of your controller doesn't have USB but ATXMEGA64B1 has USB so its just connection between micro USB connector D+ and D- and controller D+ and D-.
One more question, micro USB has one more pin ID(i.e. Mode Select). What to do with that pin?

 

[FenTrac]

That pin is left unconnected. It is the ID pin. It is connected to ground on the A connector (host) and left unconnected on the B connector (device), according to the Wikipedia USB article.