LRI64-A1S STMICROELECTRONICS [STMicroelectronics], LRI64-A1S Datasheet - Page 6

• 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]

LRI64
SIGNAL DESCRIPTION
AC1, AC0. The pads for the Antenna Coil. AC1
and AC0 must be directly bonded to the antenna.
COMMANDS
The LRI64 supports the following commands:
Inventory. Used to perform the anti-collision se-
quence. The LRI64 answers to the Inventory com-
mand when all of the 64 bits of the UID have been
correctly written.
Stay Quiet. Used to put the LRI64 in Quiet mode.
In this mode, the LRI64 only responds to com-
mands in Addressed mode.
Read Block. Used to output the 8 bits of the se-
lected block.
Write Block. Used to write a new 8-bit value in
the selected block, provided that the block is not
locked. This command can be issued only once to
each block.
POWER TRANSFER
Power transfer to the LRI64 is accomplished by in-
ductive coupling of the 13.56MHz radio signal be-
tween the antennas of the LRI64 and VCD. The
RF field transmitted by the VCD induces an AC
voltage on the LRI64 antenna, which is then recti-
fied, smoothed and voltage-regulated. Any ampli-
tude modulation present on the signal is
demodulated by the Amplitude Shift Keying (ASK)
demodulator.
Frequency
ISO 15693 and ISO 18000-3 Mode 1 standards
define the carrier frequency (f
field to be 13.56MHz±7kHz.
6/38
C
) of the operating
Get_System_Info. Used to allow the application
system to identify the product. It gives the LRI64
memory size, and IC reference (IC_ID).
Initial Dialogue for Vicinity Cards
The dialogue between the Vicinity Coupling De-
vice (VCD) and the LRI64 is conducted according
to a technique called Reader Talk First (RTF). This
involves the following sequence of operations:
1. activation of the LRI64 by the RF operating
2. transmission of a command by the VCD
3. transmission of a response by the LRI64
Operating Field
The LRI64 operates continuously between H
and H
–
–
A VCD generates a field of at least H
exceeding H
field of the VCD
The minimum operating field is H
value of 150mA/m (rms).
The maximum operating field is H
a value of 5A/m (rms).
max
.
max
in the operating volume.
min
max
min
and has a
and has
and not
min