* \warning The UC3 device support is currently <b>experimental</b> (incomplete and/or non-functional), and is included for preview purposes only. \n
*
* - No demos, bootloaders or projects have been ported for the UC3 devices in the current release,
* although the architecture is supported in the LUFA core library.
* - DMA transfers to and from the USB controller are not yet implemented for this release.
* - The UC3C, UC3D and UC3L sub-families of UC3 are not currently supported by the library due to their
* altered USB controller design.
* - The various \c CreateStream() functions for creating standard \c <stdio.h> compatible virtual file
* streams are not available on the UC3 architecture, due to a lack of suitable library support.
* - XMEGA Architecture
* \warning The XMEGA device support is currently <b>experimental</b> (incomplete and/or non-functional), and is included for preview purposes only.
*
* - No demos, bootloaders or projects have been ported for the XMEGA devices in the current release,
* although the architecture is supported in the LUFA core library.
* - Endpoints of more than 64 bytes are not currently supported in this release.
* - Isochronous endpoints are not currently supported in this release. As a result, the audio class
* cannot be used on XMEGA devices.
* - Multiple-bank endpoints are not currently supported in this release.
* - Early revisions of the ATXMEGA128A1U are incompatible with LUFA, due to their various errata
* relating to the USB controller.
* - Architecture Independent
* - The HID parser fails for array type elements that have a MIN and MAX usage applied; each element
* in the array will receive a unique incrementing usage from the MIN value, up to MAX.
* - The LUFA library is not watchdog aware, and thus timeouts are possible if short periods are used
* and a lengthy USB operation is initiated.
* - No LUFA provided driver INF files for Windows are signed, and thus may fail to install on systems where driver signing is enforced (e.g. Windows 8).
* - No LUFA provided driver INF files for Windows are signed, and thus may fail to install on systems where driver signing is enforced (e.g. Windows 8).