XRA00 Datasheet | STMicroelectronics

FEATURES SUMMARY s Based on the EPCglobal class 1b specification s Figure 1. Delivery Forms 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 Space coding (up to 140 kbit/s) Bi-phase s s s s s s s 128 bits EEPROM with Lock Function 96 bits e PC Inventory, Read, Program and Erase functions Kill mand 30ms Programming Time (typical) More than 10000 Write/Erase cycles More than 40 Year Data Retention Wafer August 2004 plete data available under NDA. 1/4 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 mand 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 e PC e PC e PC e PC e PC e PC Kill Code Note: 1. ST writes part of the e PC 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 e PC specification. The next six...