ATA559001-DBW Atmel, ATA559001-DBW Datasheet - Page 62

• 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

8.6
8.7
8.8
8.9
62
Data Field
CRC Field
End of Transmission (EOT) Mechanism During the Forward Link
Full Duplex Operation During the Forward Link
ATA5590
Table 8-13.
Table 8-14.
To program the EEPROM, a 32-bit data field is used to transmit the contents of the block.
The CRC field has a length of 16 bits. The tag expects the inverted CRC value to check against
the constant residue. If the residue is also correct, the command is accepted, and the tag is syn-
chronous to the link.
If the tag is synchronous to the reader, it is possible to activate an adaptive CRC mode during
the forward link. Then the tag backscatters the calculated inverted CRC value to the reader in a
loop, and the reader has to send an acknowledgement. It is also possible to shorten the CRC
frame, because the reader has already received the decoded data.
The EOT frame is built by two EOF symbols.
Note:
After becoming synchronous to the reader stream, ATA5590 backscatters the received and
decoded data back to the reader. Therefore, the reader is able to check the link on the fly.
Figure 8-5.
Note:
The full duplex possibility enables an adaptation possibility of the link by making the length of the
CRC frame adaptive (minimum length is one bit). Furthermore, the adaptive CRC link enables
longer CRC fields, if needed, because the CRC is backscattered in a loop.
Parameter(7)
1 symbolic address
0 physical address
Parameter(7)
1 symbolic address
0 physical address
The first symbol after the EOF1 symbol (which can be the EOF2 symbol) is used by the tag to
mark the command status. Then the reader knows if the command can be accepted by the tag, or
if the command CRC was correct.
If the tag does not support the command (but the command CRC was correct) or the required
address information, the tag stops backscattering the received values back.
Tag backscatters
Reader transmits
Address Coding for anticollision_pointer, anticollision_pointer_random, group_p,
group_leeq, group_p_greq, read Commands
Address Coding for the Prognbyte Command
Modulation Scheme of the Full-duplex Forward Link
Page Address
Parameter(5:3)
Parameter(5:3)
Page address
Address(2:0)
Address(2:0)
Data(n - 1)
Data(n)
0
Data(n + 1)
Data(n)
1
Block Address
Address(7:6)
Address(7:6)
Block Address
Address(7:6)
Address(7:6)
Data(n + 2)
Data(n + 1)
0
Data(n + 3)
Data(n + 2)
Bit Pointer
Address(4:0)
Address(4:0)
Binary Byte Select Information
Parameter(6:3)
Parameter(6:3)
0
Data(n + 4)
Data(n + 3)
1
4817C–RFID–03/07