ATA559001-DBW Atmel, ATA559001-DBW Datasheet - Page 12

• Manufacturer Part Number: ATA559001-DBW
• Description: RF Wireless Misc UHF (1kbit r/w anti- collis. Ni-Au)
• Manufacturer: Atmel

Specifications of ATA559001-DBW

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3. Memory
3.1
12
Tag_ID Page
ATA5590
ATA5590 is a wireless data carrier IC with a UHF carrier and backscatter-based link mechanism.
Data is stored in an EEPROM, and the content is under the control of manufacturers and the
end user.
ATA5590 contains an EEPROM to store a Tag_ID, system-related information, and user-control-
lable data. The memory access is controlled by commands transmitted by the reader.
Additionally, the manufacturer area is controlled by a security mechanism which is destroyed
after sawing.
The memory itself is split in 2 parts:
ATA5590 does not protect data against reading but does protect against overwriting. To protect
data against reading, the user should use encryption. For decryption, the user could use, for
example, the user-controlled system information page (control memory) to store a pointer to an
external device or memory to retrieve the key and the information regarding the algorithm used
over a secure connection.
The memory is organized in pages of 128 bits. Each page is organized in blocks of 32 bits. For
programming, each block must be programmed separately. The page is protected against over-
writing by a lock bit which is located at the MSB position (bit 31 of page 3). Therefore, the lock bit
should be set in an additional step or as the last command during the programming of a page.
The system memory supports:
Some short commands address the Tag_ID page automatically. In the default configuration, the
Tag_ID is used to create a link between the tag and, for example, an item. Nevertheless, the
user is free to store such an ID at other locations of the memory as well. The following descrip-
tion applies to the default configuration.
The Tag_ID and the type of the ID construction shall be programmed before using the tag in the
application. During programming, it can be locked against over-programming. After locking, the
Tag_ID is a fixed value. Nevertheless, it is also possible to program virgin tags one by one out of
a bulk arrangement by using the separation ability of the anticollision procedure.
The length of the ID depends on the type (structure definition) of the ID. By default, a 96-bit field
is reserved (ID page) plus an 8-bit value to define the structure of the ID (DSFID).
The Tag_ID is located in the system memory area, and can be addressed directly (control mem-
ory page address 0) or via the symbolic address 0h.
If more than 96 bits are needed, the user is free to store the rest of the structure in the user
memory, because deterministic anticollision and group-selection routines are able to include the
neighbor pages of the ID page (user memory) in the arbitration frame.
• The user memory (1 Kbit)
• The control memory (320 bits) containing the Tag_ID and other sequences such as AFI,
• A Tag_ID page, which can also be related to an object to which the tag is attached
• A user system-information page
• Two manufacturer system-information blocks
DSFID, etc.
4817C–RFID–03/07