Update XMEGA clock management so that the correct 16-bit calibration is used when requested. Fix endpoint descriptor table so that the frame number is stored into the correct location. Add compile time option to source the USB clock from the PLL rather than the internal 32MHz RC oscillator.

XMEGA port improvements; connection and disconnection are now detected correctly. Fixed incorrect interrupt priority levels being set for XMEGA devices.

Fixed CDC class drivers not saving and sending all 16-bits of the control line states (thanks to Matthew Swabey).

Cleanups to the UC3 endpoint/pipe multi byte read code.

Rename the Doxygen page source directory from ManPages/ to DoxygenPages/ to prevent user confusion with the actual *nix Man tool.

Added reliability patches to the AVRISP-MKII Clone project's PDI/TPI protocols (thanks to Justin Mattair).

When automatic PLL management mode is enabled on the U4 series AVR8 chips, the PLL is now configured for 48MHz and not a divided 96MHz, to lower power consumption and to keep the system within the datasheet specs for 3.3V operation (thanks to Scott Vitale).

Fix additional warnings under GCC 4.6.

USB XMEGA support improvements; add DFLL clock platform support, ensure the endpoint table is correctly aligned and configured in the USB controller.

Added reliability patches to the AVRISP-MKII Clone project's ISP and PDI/TPI protocols (thanks to Justin Mattair).

Add core support for the ATXMEGA64A1U.

Minor documentation corrections.

Fix compile error on the UC3 targets when INTERRUPT_CONTROL_ENDPOINT compile time option is used (thanks to Ian Woloschin).

Small size improvement for Little Endian devices when USB host mode is used.

Minor documentation fixes.

Add missing "used" attribute to ATTR_INIT_SECTION to ensure functions declared with that meta-attribute are not discarded by the linker.

Add missing function and definition documentation.

Fix missing closing brace in an Endpoint function for the UC3 targets.

Fixed HID Parser's largest report size bit count not including the size of the last parsed report item.

Fixed HID host driver's largest HID report size count corrupt when the number of report bits exceeds 255.

Fixed optimization error in the HID Parser item value USB_SetHIDReportItemInfo() and USB_GetHIDReportItemInfo() routines if the report item was NULL (which should be allowable according to the API).

Fixed HID Parser CALLBACK_HIDParser_FilterHIDReportItem() callback function not being passed a cacheable report item pointer.

Oops - restore conditional calls to USB_USBTask() in the Mass Storage class driver for the non-stream loops.

Update the TempDataLogger project and driver documentation to use the new TWI_BITLENGTH_FROM_FREQ() macro.

Change Delay_MS() to accept a 16-bit parameter rather than an 8-bit parameter for longer possible delays.

Minor documentation improvements.

Make TWI_ReadPacket() use a repeated start condition rather than a full bus release/recapture after the read address has been sent.

Fix TWI_ReadPacket() not releasing the bus correctly after all data transferred.

Make TWI_SendByte() and TWI_ReceiveByte() non-inline to reduce compiled binary size.

Remove redundant prototype for Audio_Host_StartStopStreaming() and Audio_Host_GetSetEndpointProperty(). Update host mode Audio class inline functions to prevent unused parameter warnings.

Renamed USB_Host_ClearPipeStall() to USB_Host_ClearEndpointStall() as the function works on an endpoint address within the attached device, and not a Pipe within the host.

Updated MS_Host_ResetMSInterface() to now perform a full Mass Storage reset sequence to prevent data corruption in the event of a device lock up or timeout (thanks to David Lyons).

Add parenthesis around the library Endianness macros that do nothing on a particular architecture to prevent operator precedence issues depending on usage.

Minor documentation corrections.

Add extra parenthesis around terms in the common MIN() and MAX() macros to prevent issues with non-trivial macro inputs (thanks to David Lyons).