LRI64-A1S STMICROELECTRONICS [STMicroelectronics], LRI64-A1S Datasheet - Page 5

• Manufacturer Part Number: LRI64-A1S
• Description: Memory TAG IC, 64-bit Unique ID with WORM User Area 13.56MHz, ISO15693 and ISO18000-3 Mode 1 Compliant
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SUMMARY DESCRIPTION
The LRI64 is a contactless memory, powered by
an externally transmitted radio wave. It contains a
120-bit non-volatile memory. The memory is orga-
nized as 15 blocks of 8 bits, of which 7 blocks are
accessible as Write-Once Read-Many (WORM)
memory.
Figure 2. Logic Diagram
The LRI64 is accessed using a 13.56MHz carrier
wave. Incoming data are demodulated from the re-
ceived Amplitude Shift Keying (ASK) signal, 10%
modulated. The data are transferred from the
reader to the LRI64 at 26Kbit/s, using the “1-out-
of-4” pulse encoding mode.
Outgoing data are sent by the LRI64, generated by
load variation on the carrier wave, using Manches-
ter coding with a single sub-carrier frequency of
423kHz. The data are transferred from the LRI64
to the reader at 26Kbit/s, in the high data rate
mode.
The LRI64 supports the high data rate communi-
cation protocols of ISO 15693 and ISO 18000-3
Mode 1 recommendations. All other data rates and
modulations are not supported by the LRI64.
Table 1. Signal Names
Figure 3. MLP Connections
AC1
AC0
AC0
n/c
n/c
n/c
Memory
WORM
120-bit
1
2
3
4
LRI64
Antenna Coil
Antenna Coil
Demodulator
8
7
6
5
Manchester
Modulator
Regulator
Supply
Power
Load
AC1
n/c
n/c
n/c
ASK
AI11612
AC0
AC1
AI08590
Memory Mapping
The LRI64 is organized as 15 blocks of 8 bits as
shown in
write-protected after the first valid write access.
Figure 4. LRI64 Memory Mapping
The LRI64 uses the first 8 blocks (blocks 0 to 7) to
store the 64-bit Unique Identifier (UID). The UID is
used during the anti-collision sequence (Invento-
ry). It is written, by ST, at time of manufacture, but
part of it can be customer-accessible and custom-
er-writable, on special request.
The LRI64 has an AFI register, in which to store
the Application Family Identifier value, which is
also used during the anti-collision sequence.
The LRI64 has a DSFID register, in which to store
the Data Storage Format Identifier value, which is
used for the LRI64 Inventory answer.
The five following blocks (blocks 10 to 14) are
Write-Once Read-Many (WORM) memory. It is
possible to write to each of them once. After the
first valid write access, the block is automatically
locked, and only read commands are possible.
Block
Addr
Figure 4.
10
11
12
13
14
0
1
2
3
4
5
6
7
8
9
0 1 2 3 4 5 6 7
DSFID (WORM Area)
AFI (WORM Area)
Each block is automatically
UID 5 = IC_ID
WORM Area
WORM Area
WORM Area
WORM Area
WORM Area
UID 7 = E0h
UID 6 = 02h
UID 0
UID 1
UID 2
UID 3
UID 4
AI09741
LRI64
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