ATXMEGA64A1 datasheet(14/99 Pages) ATMEL

14 / 99 page

8067I–AVR–04/09

XMEGA A1

7.5

Production Signature Row

The Production Signature Row is a separate memory section for factory programmed data. It

contains calibration data for functions such as oscillators and analog modules.

The production signature row also contains a device ID that identify each microcontroller device

type, and a serial number that is unique for each manufactured device. The device ID for the

available XMEGA A1 devices is shown in Table 7-1 on page 14. The serial number consist of

the production LOT number, wafer number, and wafer coordinates for the device.

The production signature row can not be written or erased, but it can be read from both applica-

tion software and external programming.

Table 7-1.

Device ID bytes for XMEGA A1 devices.

7.6

User Signature Row

The User Signature Row is a separate memory section that is fully accessible (read and write)

from application software and external programming. The user signature row is one flash page

in size, and is meant for static user parameter storage, such as calibration data, custom serial

numbers or identification numbers, random number seeds etc. This section is not erased by

Chip Erase commands that erase the Flash, and requires a dedicated erase command. This

ensures parameter storage during multiple program/erase session and on-chip debug sessions.

Device

Device ID bytes

Byte 2

Byte 1

Byte 0

ATxmega64A1

ATxmega128A1

ATxmega192A1

ATxmega256A1

ATxmega384A1

TBD

ATXMEGA64A1 Datasheet(PDF) 14 Page - ATMEL Corporation