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XRA00
UHF, EPCglobal, Contactless Memory IC 96 bit ePC with Inventory and Kill Function
DATA BRIEF
FEATURES SUMMARY s Based on the EPCglobal class 1b specification
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Figure 1. Delivery Forms
UHF Carrier Frequencies - 868MHz ISM Band - 915MHz ISM Band
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To the XRA00: - Asynchronous 50% to 100% ASK modulation using PWM pulse coding (up to 70 kbit/s)
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From the XRA00: - Back-scattered answers using Space coding (up to 140 kbit/s) Bi-phase
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128 bits EEPROM with Lock Function 96 bits ePC Inventory, Read, Program and Erase functions Kill Command 30ms Programming Time (typical) More than 10000 Write/Erase cycles More than 40 Year Data Retention
Wafer
August 2004
Complete data available under NDA.
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XRA00
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, organized 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 receiving a valid and appropriate command from the reader. Based on the EPCglobal class 1b specification, the device provides a fast and flexible anticollision protocol that is robust in the noisy and unpredictable RF conditions that are typical of RFID applications. Figure 2. Logic Diagram
XRA00 Power Supply Regulator 128-bit EEPROM ASK Demodulator AC0 Reflecting Modulator
Memory Mapping The XRA00 is organized as 8 blocks of 16 bits as shown in Figure 3. Each bit can be read individually. Writing is performed by block of 16 bits. Figure 3. XRA00 Memory Mapping
Address 0 1 2 3 4 5 6 7 Lock Bits 15 8 7 0
CRC ePC ePC ePC ePC ePC ePC Kill Code
Note: 1. ST writes part of the ePC code
AC1
AI08740
Table 1. Signal Names
AC1 AC0 Antenna Pad Antenna Pad
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 memory 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 discrimination, 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 responds to commands from the Reader. - KILL: XRA00, matching the entire ID Code, 16bit CRC and the 8-bit Kill Code sent by the
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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 accomplished 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. 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).
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-collision commands; the ERASEID, PROGRAMMEID and VERIFYID commands are de-activated. Table 2. Ordering Information Scheme
Example: Device Type XRA00 XRA00
PART NUMBERING For a list of available options or for further information 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 following email address: ask.memory@st.com
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W4I
/ XXX
Package W4I =180m 15 m Unsawn Inkless Wafer SBN18I = 180m 15 m Bumped and Sawn Inkless Wafer on 8-inch Frame Customer Code XXX = Given by STMicroelectronics
REVISION HISTORY Table 3. Document Revision History
Date 27-Aug-2003 13-Aug-2004 Version 1.0 2.0 First Issue Dipole inlay package option removed. Auto-ID changed to EPCglobal. Sawn and Unsawn Wafers changed to Sawn and Unsawn Inkless Wafers Revision Details
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XRA00
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. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2004 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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