Rockwell Automation 56RF RFID System User Manual - Manual (Page 22)

22 Rockwell Automation Publication 56RF-UM001A-EN-P - October 2011
Chapter 2 RFID Components
Smart Label IC – Secure (SLI-S)
The 2048 bit EEPROM memory is divided into 64 blocks. A block is the
smallest access unit. Each block consists of 4 bytes (1 block = 32 bits). Four
blocks are summed up to one page for password protection. Bit 0 in each byte
represents the least significant bit (LSB) and bit 7 the most significant bit (MSB),
respectively.
The memory is divided into two parts:
• Configuration Area: This memory area stores all required information,
such as UID, EPC data, write protection, access control information,
passwords, etc. Direct access to this memory area is not possible.
• User Memory: This memory area stores user data. Direct read/write
access to this part of the memory is possible depending on the related
security and write protection conditions.
The table below shows the memory organization of an SLI-S tag.
Table 12 - SLI-S Memory Organization
Page Block Byte 0 Byte 1 Byte 2 Byte 3 Description
-6 -24 Configuration area for internal use
-23
-22
-21
: : : : : :
: : : : : :
: : : : : :
: : : : : :
-1 -4
-3
-2
-1
0 0 User Memory
10 pages
4 blocks per page
4 bytes per block
Total: 160 bytes
1
2
3
: : : : : :
: : : : : :
9 36
37
38
39