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DATA BRIEFING
August 2003
Complete data available under NDA.
XRA00
UHF, Auto-ID Class 1b, Contactless Memory IC
96 bit ePC with Inventory and Kill Function
FEATURES SUMMARY
s
Auto-ID Class-1b fully compliant
s
UHF Carrier Frequencies
868MHz ISM Band
915MHz ISM Band
s
To the XRA00:
Asynchronous 50% to 100% ASK modulation
using PWM pulse coding (up to 70 kbit/s)
s
From the XRA00:
Back-scattered answers using Bi-phase
Space coding (up to 140 kbit/s)
s
128 bits EEPROM with Lock Function
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96 bits ePC
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Inventory, Read, Program and Erase functions
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Kill Command
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30ms Programming Time (typical)
s
More than 10000 Write/Erase cycles
s
More than 40 Year Data Retention
Figure 1. Delivery Forms
Wafer
Antenna
(Inlay HU1 and Inlay HE1)
XRA00
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SUMMARY DESCRIPTION
The XRA00 is a full-featured, low-cost integrated
circuit for use in radio frequency identification
(RFID) transponders (tags) operating in the UHF
band of frequencies. It is a 128-bit memory, orga-
nized as 8 blocks of 16 bits, as shown in Figure 3.
When connected to its antenna, operating power
is derived from RF energy produced by the RFID
reader. The XRA00 non-volatile memory enables
users to program tags at the point of application, if
desired. The XRA00 will respond only after first re-
ceiving a valid and appropriate command from the
reader.
Compliant with the Auto-ID Center Class 1 UHF
Specification, the device provides a fast and flexi-
ble anticollision protocol that is robust in the noisy
and unpredictable RF conditions that are typical of
RFID applications.
Figure 2. Logic Diagram
Table 1. Signal Names
Memory Mapping
The XRA00 is organized as 8 blocks of 16 bits as
shown in Figure 3. Each bit can be read individu-
ally. Writing is performed by block of 16 bits.
Figure 3. XRA00 Memory Mapping
Note: 1. ST writes part of the ePC code
The XRA00 uses the first block to store the CRC,
as defined in the ePC specification. The next six
blocks are used to store the 96-bit ePC that is
used during the inventory sequence.
The last block is shared between the 8-bit Kill
Code and the 8 Lock Bits used to protect the mem-
ory data content.
Commands
The XRA00 supports the following commands:
SCROLLID:
XRA00, matching data, replies by
sending back the entire ID Code. This command
is used during the anti-collision sequence.
SCROLLALLID:
XRA00, without discrimina-
tion, replies by sending back the entire ID Code.
PINGID:
This command is used as part of a
multi-XRA00 anti-collision sequence. XRA00,
matching data sent by the Reader, responds in
a specific slot.
QUIET:
XRA00, matching data sent by the
Reader, enters the Asleep state where it no
longer responds to Reader commands. This
Asleep state is maintained until an appropriate
Talk command is received, or power has been
removed.
TALK:
XRA00, matching data sent by the
Reader, returns to the Awake state where it re-
sponds to commands from the Reader.
KILL:
XRA00, matching the entire ID Code, 16-
bit CRC and the 8-bit Kill Code sent by the
AC1
Antenna Pad
AC0
Antenna Pad
AI08740
AC1
XRA00
AC0
Power
Supply
Regulator
Reflecting
Modulator
ASK
Demodulator
128-bit
EEPROM
Address
15
8
7
0
0
CRC
1
ePC
2
ePC
3
ePC
4
ePC
5
ePC
6
ePC
7
Lock Bits
Kill Code
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XRA00
Reader, is permanently deactivated and will no
longer respond to Reader queries.
ERASEID:
The EraseID command is a bulk
erase of the entire memory array.
PROGRAMID:
XRA00 programming is accom-
plished 16 bits at a time. Programming is only
allowed if the XRA00 has not been previously
locked.
VERIFYID:
The VerifyID command is used to
verify that all the memory data bits have been
programmed correctly.
MODES
USER mode
When the ePC information is written and the lock
bits are programmed, the XRA00 is in User mode.
In this mode, the XRA00 answers to the anti-colli-
sion commands; the ERASEID, PROGRAMMEID
and VERIFYID commands are de-activated.
Initial Dialog for XRA00
The dialogue between the Reader and the XRA00
is conducted through the following consecutive
operations:
Activation of the XRA00 by the UHF operating
field of the Reader
Transmission of a command by the Reader
Transmission of a response by the XRA00
This technique is called RTF (Reader Talk First).
PART NUMBERING
For a list of available options or for further informa-
tion on this device, please see the current Memory
Shortform Catalog. For further information on any
aspect of this device, please contact your nearest
ST Sales Office, or send your enquiries to the fol-
lowing email address:
memories.contact-
less@st.com
Table 2. Ordering Information Scheme
REVISION HISTORY
Table 3. Document Revision History
Example:
XRA00
W4
/ XXX
Device Type
XRA00
Package
W4 =180m 15 m Unsawn Wafer
SBN18 = 180m 15 m Bumped and Sawn Wafer on 8-inch Frame
HE1T = Dipole Copper Antenna on Continuous Tape for Europe
HE1S = Dipole Copper Singulated Adhesive Antenna on Tape for Europe
HU1T = Dipole Copper Antenna on Continuous Tape for U.S.
HU1S = Dipole Copper Singulated Adhesive Antenna on Tape for U.S.
Customer Code
XXX = Given by STMicroelectronics
Date
Version
Revision Details
27-Aug-2003
1.0
First Issue
XRA00
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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All other names are the property of their respective owners
2003 STMicroelectronics - All Rights Reserved
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