xra00 STMicroelectronics, xra00 Datasheet - Page 5

• Manufacturer Part Number: xra00
• Description: Uhf, Epcglobal Class 1b, Contactless Memory Chip 96 Bit Epc With Inventory And Kill Function
• Manufacturer: STMicroelectronics

SUMMARY DESCRIPTION
The XRA00 is a low-cost integrated circuit for use
in Radio Frequency Identification (RFID) tran-
sponders (tags) operating at UHF frequencies. It is
a 128 bit memory organized as 8 blocks of 16 bits
as shown in
When connected to an antenna, the operating
power is derived from the RF energy produced by
the RFID Reader. Incoming data are demodulated
and decoded from the received Amplitude Shift
Keyed (ASK) signal and outgoing data are gener-
ated by the antenna reflectivity change using the
Frequency Shift Keying (FSK) coding principle.
The Data transfer rate is determined by the local
UHF frequency regulation.
The XRA00 follows the ePCglobal Class 1b UHF
recommendation for the radio-frequency power
and signal interface.
Figure 2. Pad Connections
The dialogue between the Reader and the XRA00
is conducted through the following consecutive
operations:
This technique is called Reader Talk First (RTF).
Table 1. Signal Names
The XRA00 is specifically designed for extented
range applications that need automatic item iden-
tification. The XRA00 provides a fast and flexible
anti-collision protocol that is robust under noisy
and unpredictable RF conditions typical of RFID
AC1
AC0 (GND)
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
EEPROM
128 Mbit
Memory
Table 5.
Demodulator
Regulator
Reflecting
Modulator
Supply
Power
Antenna Pad
Antenna Pad
ASK
AC1
AC0
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applications. It is based on a determinist binary
tree scanning method accelerated by bin slot dis-
tribution. The XRA00 EEPROM memory can be
read and written, so that the users can program
the ePC code themselves, if desired.
The XRA00 has the following command set:
– SCROLLID: XRA00, matching data sent by the
– SCROLLALLID: XRA00 replies in an indiscrim-
– PINGID: This command is used as part of a
– QUIET: XRA00, matching data sent by the
– TALK: XRA00, matching data sent by the
– KILL: XRA00, matching the entire ID Code, 16
– ERASEID: The EraseID command is used to
– PROGRAMID: XRA00 programming is accom-
– VERIFYID: The VerifyID command is used to
Figure 3. Die Floor Plan
Reader, replies by sending back the entire ID
Code. This command is used during the anti-
collision sequence.
inate way by sending back the entire ID Code.
multi-XRA00 anti-collision sequence. XRA00,
matching data sent by the Reader, responds in
one of the eight specific bin slots.
Reader, enters the Asleep state where it no
longer responds to the Reader commands. The
memory remains in the Asleep state until a valid
Talk command is received or the persistence
mode limit time has run out.
Reader, returns to the Awake state where it re-
sponds to commands from the Reader.
bit CRC and the 8 bit Kill Code sent by the
Reader, no longer responds to Reader queries.
erase the entire memory array.
plished 16 bits at a time. Programming is al-
lowed only when the XRA00 is not locked.
verify that all memory data bits have been pro-
grammed correctly.
(GND) AC0
XRA00
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