ATA559001-DBW Atmel, ATA559001-DBW Datasheet - Page 91

• 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

13.7.5
4817C–RFID–03/07
Further Possibilities with Group_AFI Command
Table 13-6.
The structure of the whole frame is as follows:
Table 13-7.
Note:
The arbitration starts at bit 125 of page 0 (MSB of AFI) of the control memory. The arbitration will
be lost if the extracted data of the forward data stream is not the same as the data stored in the
memory. After receiving 8 bits of AFI, the tag checks if it has received a 00h. If the tag has
received a 00h, the result of the arbitration no longer matters and the backscatter mechanism of
the return link will be active.
This pre_select flag can be reset by receiving a reset command or by cutting the power supply
for more than 8 seconds (at 25°C).
Note:
The start address of the arbitration can be selected by the parameter field.
Table 13-8.
ID Page
Block 3
Block 2
Block 1
Block 0
Note:
• Parameter(3): If set to “0”, arbitration starts with block 3 of the ID page; if set to “1”, arbitration
• Parameter(5:4) points to the byte of the selected block
Forward
header
starts with block 2 of the ID page.
Index
5:3
2:1
EOT consists of 2 EOF symbols
The Group_AFI command can be expanded. Therefore, it is possible to combine it directly with the
8 bits of the ID identifier (as an example). The auto decrement function of the addressing mecha-
nism is enabled.
7
6
0
The value marked in bold is the default value.
Group_AFI
Parameter Field of the Group_AFI Command
Flow of the Group_AFI Procedure
Start Address of Arbitration as a Function of Parameter(5:3)
command
Function
0 (default)
nCRC_adapt
0: adapt CRC
1: 16-bit CRC transmitted by the reader
010 (default)
Return modulation type
00: NRZI notch locked
01: 3phase1
10: NIRZ soft locked
11: FM0
Selection control
0: to all tags in the field
1: to all pre-selected tags in the field
Byte 3
110
111
Parameter
Byte 2
100
101
EOT
Return
header
Byte 1
010
011
Arbitration
over AFI
EOF
Byte 0
000
001
ATA5590
CRC
EOT
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