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D101925 0412 - BLident® UHF
2-3
General information on the UHF data carriers
BL ident® UHF data carriers with the following memory types are currently available:

EEPROM-U-Code G2

EEPROM-Monza

EEPROM-Higgs
2.5.1 Multiple access (multi-tag detection, bulk reading)
With UHF-RFID the data carriers in the BL ident® system are identified by the first eight bytes of the UII,
i.e. from address 04
hex
to 0C
hex
. These must be different for multiple access! (multiple access means that
a read/write head can communicate with different data carriers simultaneously. The read/write head
can therefore specifically address a data carrier by means of its UII)
If the data carriers are all factory set with the same UII, these must be written individually with different
UIIs before being used for the first time in applications with multiple access.
Figure 1:
UHF data carrier
memory hierarchy
Note
The number of banks for the different memory types varies in part.
For example the Impinj Monza 3 only has three banks (the user bank is missing here), while
the Alien Higgs 3 has all four banks.
Bank 11
Bank 10
Bank 01
Bank 00
MSB LSB
MSB LSB
MSB LSB
MSB LSB
00
hex
0F
hex
10
hex
1F
hex
00
hex
0F
hex
220
hex
22F
hex
210
hex
21F
hex
20
hex
2F
hex
10
hex
1F
hex
00
hex
0F
hex
30
hex
3F
hex
20
hex
2F
hex
10
hex
1F
hex
00
hex
0F
hex
...
Optional XPC_W2 [15:0]
Optional XPC_W2 [15:0]
...
EPC/UII/... [15:0]
...
EPC/UII/... [N:N-15]
PC [15:0]
CRC [15:0]
...
Word 0 of Block 0
...
TID [15:0]
TID [31:16]
...
Access Passwd [15:0]
Access Passwd [31:16]
Kill Passwd [15:0]
Kill Passwd [31:16]
User
TID
EPC/UII/...
Reserved