This page is intended to show the outline of the chip and to provide additional information that might not be clear from the data sheet.
Here a note about the spike detector :
>The calibration byte in the production signature row show 0xFF and 0x00
>for the ADC Calibration byte. Are these really the calibration values ?
>And I'm not able to set the HIGH Byte of the calibration register.
>Errata of Rev H don't show something from calibration bytes.
Reply from Atmel :
The voltage spike detector has been removed from the latest revision of the XMEGA A manual.
This is because we have, unfortunately, not been able to validate the spike detector fully.
The module is disabled in currently available parts to avoid unforeseen problems for any customers.