LRI2K-W4/3GE STMicroelectronics, LRI2K-W4/3GE Datasheet - Page 44

• Manufacturer Part Number: LRI2K-W4/3GE
• Description: IC EEPROM 2048BIT 97PF 8UFDFPN
• Manufacturer: STMicroelectronics

Specifications of LRI2K-W4/3GE

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO15693, ISO18000-3
• Package / Case: 8-UFDFPN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Inventory Initiated command
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Inventory Initiated command
The LRI2K provides a special feature to improve the inventory time response of moving tags
using the Initiate_flag value. This flag, controlled by the Initiate command, allows tags to
answer to Inventory Initiated commands.
For applications in which multiple tags are moving in front of a reader, it is possible to miss
tags using the standard inventory command. The reason is that the inventory sequence has
to be performed on a global tree search. For example, a tag with a particular UID value may
have to wait the run of a long tree search before being inventoried. If the delay is too long,
the tag may be out of the field before it has been detected.
Using the Initiate command, the inventory sequence is optimized. When multiple tags are
moving in front of a reader, the ones which are within the reader field will be initiated by the
Initiate command. In this case, a small batch of tags will answer to the Inventory Initiated
command which will optimize the time necessary to identify all the tags. When finished, the
reader has to issue a new Initiate command in order to initiate a new small batch of tags
which are new inside the reader field.
It is also possible to reduce the inventory sequence time using the Fast Initiate and Fast
Inventory Initiated commands. These commands allow the LRI2Ks to increase their
response data rate by a factor of 2, up to 53kbit/s.
LRI2K