User's Manual

V740 RFID READER/WRITER, ANTENNA 2005-07, REV.01
OPERATION MANUAL
20 of 45 ©OMRON CORPORATION 2005
1.6 Tag Fundamentals
Class 1B Tags
Class 1B tags contain 128 bits of programmable
memory. The format is almost the same as the Class
1 tags. Bit count of EPC code is 96.
Tag Memory Structure
Protocols and the tag memory structures supported by
the V740 reader are described below. For additional
information regarding tag operation, refer to each tag
specification.
Byte Bit
Contents
1 0-7
2 8-15
3 16-23
4 24-31
5 32-39
6 40-47
7 48-55
8 56-63
9 64-71
10 72-79
11 80-87
12 88-95
13 96-103
14 104-111
Check Code
(
CRC
)
Class 0 Tags
Class 0 tags contain 112 bits of read only memory. It
consists of EPC Code and Check Code data. 96 bits
of them are EPC Code and the rest 16 bits are Check
Code data for the EPC Code.
EPC Code
12bytes (96bits)
Byte Bit
Contents
1 0-7
2 8-15
3 16-23
4 24-31
5 32-39
6 40-47
7 48-55
8 56-63
9 64-71
10 72-79
11 80-87
12 88-95
13 96-103
14 104-111
EPC Code
12bytes (96bits)
Check Code
(
CRC
)
Class 1 Tags
Class 1 tags contain 96 bits of programmable memory.
It consists of EPC Code, Check Code data. 64 bits of
them are EPC Code, and the first 16 bits of them are
Check Code for the EPC Code.
Byte Bit
Contents
1 0-7
2 8-15
3 16-23
4 24-31
5 32-39
6 40-47
7 48-55
8 56-63
9 64-71
10 72-79
C
h
ec
k
Code
(C
R
C)
EPC Code
8bytes (64bits)