Register Description - General Purpose I/O Memory; Register Descriptions - Mcu Control - Atmel AVR XMEGA D Series Manual

4.15 Register Description – General Purpose I/O Memory
4.15.1 GPIORn – General Purpose I/O register n
4.16 Register Descriptions – MCU Control
4.16.1 DEVID0 – Device ID register 0
4.16.2 DEVID1 – Device ID register 1
4.16.3 DEVID2 – Device ID register 2
8210C–AVR–09/11
Bit 7
+n
Read/Write R/W
Initial Value 0
These are general purpose register that can be used to store data such as global variables and
flags in the bit-accessible I/O memory space.
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
+0x00
Read/Write R
Initial Value 0
• 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
Bit 7
+0x01
Read/Write R
Initial Value 1/0
• Bit 7:0 – DEVID[7:0]: Device ID Byte 1
Byte 1 of the device ID indicates the flash size of the device.
Bit 7
+0x02
Read/Write R
Initial Value 1/0
• Bit 7:0 – DEVID2[7:0]: Device ID Byte 2
Byte 2 of the device ID indicates the device number.
6 5 4
GPIORn[7:0]
R/W R/W R/W
0 0 0
6 5 4
DEVID0[7:0]
R R R
0 0 1
6 5 4
DEVID1[7:0]
R R R
1/0 1/0 1/0
6 5 4
DEVID2[7:0]
R R R
1/0 1/0 1/0
Atmel AVR XMEGA D
3 2 1
R/W R/W R/W
0 0 0
3 2 1
R R R
1 1 1
3 2 1
R R R
1/0 1/0 1/0
3 2 1
R R R
1/0 1/0 1/0
0
GPIORn
R/W
0
0
DEVID0
R
0
0
DEVID1
R
1/0
0
DEVID2
R
1/0
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