Atmel AVR XMEGA AU series

47
8331B–AVR–03/12
Atmel AVR XMEGA AU
4.20 Register Descriptions – MCU Control
4.20.1 DEVID0 – Device ID register 0
DEVID0, DEVID1 and DEVID2 contain the byte identification that identifies each microcontroller
device type. For details on the actual ID, refer to the device datasheet.
• Bit 7:0 – DEVID0[7:0]: Device ID Byte 0
Byte 0 of the device ID. This byte will always be read as 0x1E. This indicates that the device is
manufactured by Atmel.
4.20.2 DEVID1 – Device ID register 1
• Bit 7:0 – DEVID[7:0]: Device ID Byte 1
Byte 1 of the device ID indicates the flash size of the device.
4.20.3 DEVID2 – Device ID register 2
• Bit 7:0 – DEVID2[7:0]: Device ID Byte 2
Byte 2 of the device ID indicates the device number.
4.20.4 REVID – Revision ID
• Bit 7:4 – Reserved
These bits are unused and reserved for future use.
Bit 76543210
+0x00 DEVID0[7:0] DEVID0
Read/Write RRRRRRRR
Initial Value 0 0 0 1 1 1 1 0
Bit 76543210
+0x01 DEVID1[7:0] DEVID1
Read/Write RRRRRRRR
Initial Value 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0
Bit 76543210
+0x02 DEVID2[7:0] DEVID2
Read/Write RRRRRRRR
Initial Value 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0
Bit 76543210
+0x03 – – – – REVID[3:0] REVID
Read/Write RRRRRRRR
Initial Value 0 0 0 0 1/0 1/0 1/0 1/0