XRA00 Datasheet, PDF (18/40 Pages) STMicroelectronics – UHF, EPCglobal, Contactless Memory IC 96 bit ePC with Inventory and Kill Function

XRA00
MEMORY MAPPING
The XRA00 is divided into 8 blocks of 16 bits. The
device is read bit by bit and written to on a block by
block basis (16 bits at a time). The XRA00 memory
map is shown in Figure 25.
In the XRA00, the first block is used to store the
CRC value as defined in the ePC specification.
The next 6 blocks are used to store the 96-bit ePC
code that is used during the inventory sequence.
The last block is divided into two 8-bit areas, one
that contains the Kill Code and the other that con-
tains the Lock Code used to protect the memory
data contents.
Figure 25. XRA00 Memory Map
Row Address 15
0
00D
1
16D
2
32D
3
48D
4
64D
5
80D
6
96D
Write Lockable User Area
Write Lockable User Area
Write Lockable User Area
Write Lockable User Area
Write Lockable User Area
Write Lockable User Area
Write Lockable User Area
7
112D
Lock Code
Kill Code
0 EPC mapping
CRC
EPC Data
EPC Data
EPC Data
EPC Data
EPC Data
EPC Data
Note: 1. ST may write part of the ePC code.
ai10764
USER mode
After programming the ePC information, the
XRA00 can be locked. Once locked, the XRA00
answers to anti-collision and scroll commands
only. The ERASEID, PROGRAMID and VERIFY-
ID commands are de-activated.
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