LRIS2K-A1S/1GE STMicroelectronics, LRIS2K-A1S/1GE Datasheet - Page 46

• Manufacturer Part Number: LRIS2K-A1S/1GE
• Description: IC MEMORY TAG 64BIT UID ADH ANT
• Manufacturer: STMicroelectronics
• Series: LRIS2Kr

Specifications of LRIS2K-A1S/1GE

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO15693, ISO18000-3, 2048-bits
• Package / Case: 76mm x 45mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5534-2

Anticollision
17
17.1
46/98
Anticollision
The purpose of the anticollision sequence is to inventory the LRIS2Ks present in the VCD
field using their unique ID (UID).
The VCD is the master of communications with one or several LRIS2Ks. It initiates LRIS2K
communication by issuing the Inventory request.
The LRIS2K sends its request in the determined slot or does not respond.
Request parameters
When issuing the Inventory command, the VCD:
●
●
●
●
●
●
Table 23.
In the example of the
added to the mask value MSB. The 11-bit Mask and the current slot number are compared
to the UID.
Table 24.
MSB
SOF
sets the Nb_slots_flag as desired
adds the mask length and the mask value after the command field
The mask length is the number of significant bits of the mask value.
The mask value is contained in an integer number of bytes. The mask length indicates
the number of significant bits. LSB is transmitted first
If the mask length is not a multiple of 8 (bits), as many 0-bits as required will be added
to the mask value MSB so that the mask value is contained in an integer number of
bytes
The next field starts at the next byte boundary.
Request_
0-bits added
(b
8 bits
flags
0000 0
15
Inventory request format
Example of the addition of 0-bits to an 11-bit mask value
) MSB
Command
8 bits
Table 24
Doc ID 13888 Rev 8
and
Optional
8 bits
AFI
Figure
38, the mask length is 11 bits. Five 0-bits are
length
Mask
8 bits
11-bit mask value
100 1100 1111
LSB (b
0 to 8 bytes
Mask value
0
)
16 bits
CRC
LRIS2K
EOF
LSB