ATA559001-6DSY Atmel, ATA559001-6DSY Datasheet - Page 50

• 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

7.4.2
7.4.3
50
ATA5590
Sync Condition
16-bit CRC
Figure 7-1.
To enable the tag for communication it is necessary that the tag is synchronous to the reader.
Therefore, the tag checks the timing of the forward header and the command CRC to decide if
the tag is synchronous or not. If these conditions are true, the tag becomes synchronous after
receiving the EOT sequence. Then the tag supports full duplex during the forward link.
The 16-bit CRC calculation (during the forward link and return link, over each section including
the command section of the forward link) is based on
x
The reset and start value is FFFFh.
During the forward link,
During the return link, the IC backscatters the inverted value back to the reader. The calculation
is made over the bits after the return header.
The remainder is: 1D0Fh
16
• The calculation is made over the 8-bit command frame, the parameter frame, and, if present,
• The tag IC expects the inverted value for CRC checking starting from the command
the address and the data (for programming) frame
+ x
12
+ x
5
+ 1
Schematic of the Command CRC and Initialization Values
crc_command (vector 1 to 0)
Comment: The reset value of the CRC register is 10
(1)
(0)
serial send data
B
4817C–RFID–03/07