ATA559001-6DSY Atmel, ATA559001-6DSY Datasheet - Page 40

• Manufacturer Part Number: ATA559001-6DSY
• Description: RF Wireless Misc UHF (1k bit r/w anti-collision)
• Manufacturer: Atmel

Specifications of ATA559001-6DSY

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

4.11
4.12
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Combination of Different Deterministic Selection Procedures
Combination of Aloha-based and Deterministic-based Selection Procedures
ATA5590
The default anticollision procedure is based principally on a Tag_ID. The deterministic anticolli-
sion procedure itself is based on an adaptable binary search. The adaptation is fully controlled
by the reader, and allows a priority change on the fly.
The deterministic anticollision is based principally on full duplex communication.
The IC stores the status of anticollision in 2 bits (ID and ID_s) in the status1 register (8 seconds
storage time without power at 25°C).
ATA5590 also supports variable pointer-based anticollision commands, and a command which
considers a random value. These commands are able to address the whole system and user
memory.
After a group or a single tag is selected, the reader is free to communicate with them
immediately.
The length of the arbitration fields is under the control of the reader. After receiving an EOF sym-
bol, the CRC section starts.
A combination of the long deterministic commands and the short repeat_arb command is possi-
ble, which results in a faster arbitration.
Anticollision and group-selection commands can be combined to achieve a hierarchical selec-
tion algorithm.
As ATA5590 supports Aloha and deterministic-based selection procedures, the user can mix
them to implement a second selection level.
4817C–RFID–03/07