Tagsys S.A. LSP3STANDARD User Manual
May 2009
Revision 0.2
27/63
5 Configuration
All configuration operations of L-SP3 systems are carried on with the L-SP3 Configuration Utility
Software.
Software.
5.1 Chip Configuration
5.1.1 Scanning Duration
For optimal performance the scanning duration (T_scan) should not exceed 250ms. T_scan
is the period to scan all pedestals of a group of N pedestals, i.e. a Master and (N-1) Slave
Pedestals. Depending on your chip configuration and the number of pedestals installed you can
determine the scanning duration of your installation.
Pedestals. Depending on your chip configuration and the number of pedestals installed you can
determine the scanning duration of your installation.
Table 3: Scanning Duration One Tag in field
EAS or AFI Detection Only
Read 8 Blocks Memory
C370/-L EAS/AFI no UID
20ms/pedestal
40ms/pedestal
Generic ISO15693 Chip
20ms/pedestal
50ms/pedestal
Example: with a 3 pedestals system using the 370-AFI + Read-Memory.
The scanning duration will be: T_scan = (20ms+20ms) x 3 = 120ms
5.1.2 EAS Mode versus AFI Mode
EAS mode is only supported by the C370 or C370-L (NXP chip). AFI mode is supported by most
ISO15693 chips, from major chip manufacturers (NXP, Texas Instrument, STM, MeMarin…).
ISO15693 chips, from major chip manufacturers (NXP, Texas Instrument, STM, MeMarin…).
EAS digital burst is a prime number data stream of 128 bits which is read out after sending a check
EAS command to the Tag. This dedicated EAS command in only implemented in NXP SLI chips.
EAS command to the Tag. This dedicated EAS command in only implemented in NXP SLI chips.
The AFI (Application Family Identifier) is an 8bit-field defined in the ISO15693 standard but not
mandatory. Whenever issuing an inventory command with a specific AFI code, only Labels with the
same matching AFI code will reply with its UID. Generally the code 9E is used to say that the book
has not been properly checked out, thus will be detected by the pedestals.
mandatory. Whenever issuing an inventory command with a specific AFI code, only Labels with the
same matching AFI code will reply with its UID. Generally the code 9E is used to say that the book
has not been properly checked out, thus will be detected by the pedestals.
5.2 Understanding the L-SP3 Synchronization Process
5.2.1 Standard Synchronization Mode
To manage a group of pedestals, a synchronization burst is sent by the master pedestal to all
the slaves’ pedestals, a token being propagated back and forth as in a token ring process. This is
called the synchronization process.
called the synchronization process.
Only one pedestal is defined to be the master who emits a synchronization burst to the next
slave in close proximity who in turns emits it to the next slave and so forth.
The other pedestals, configured as slaves, get the synchronization from the neighboring
pedestal and emits back to the next Slave of higher index.