ATA559001-6DSY Atmel, ATA559001-6DSY Datasheet - Page 25

• 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

4817C–RFID–03/07
During deterministic arbitration (deterministic selection procedures), the data field works in full
duplex mode. The tag backscatters the value of its EEPROM value bit by bit, and the reader
transfers (as a reaction to this information) a bit by bit decision. This decision then controls the
next bit operation of the tag. If the reader has transmitted a decision which corresponds with the
content of the selected bit of the EEPROM, the tag backscatters the next bit. Otherwise it is
silent until the next deterministic-arbitration command.
If the reader then marks the end of the arbitration by sending an EOT sequence,
During programming, the tag is silent. When the programming is finished or if the tag has
detected an error, the tag backscatters a sub-carrier, until the reader transmits a header to start
the return link.
Notes:
Figure 4-8.
The time required to program the EEPROM is a function of the RF field strength, and the status
of the block to which the address pointer points. If the block is locked against over programming,
the tag starts immediately to backscatter a sub-carrier back.
• The reader knows the (item level linked) ID or a part of it for the selected tag, and
• The reader is free to send new commands to this selected tag. The tags which are not
selected listen, but are not active
Forward link
1. Due to 2PSK backscatter modulation, ATA5590 is able to detect a notch until it backscatters a
2. When the RF field strength is low, the programming time is longer. The programming time
message.
depends on the field strength of the received RF signal.
Frame Construction During Programming
Reader sends CW
Program EEPROM
Variable time
Wait on reader
Sub-carrier
Header
Status2
Contents EEPROM
ATA5590
CRC
25