Tag Programming
45
Locking Tags
Individual memory pages can be locked with the
Lb
command. Once a page is locked, it
cannot be unlocked or written. The following are typical Lock commands.
To lock Page 0 (Kill code of any tag singulated using PE0 bits), enter:
}Lb!
To lock Page 2 (Kill code of any tag singulated using PE0 bits), enter:
}Lb,a:2!
(locks page 2, the EPC code of any tag singulated using PE0 bits)
To lock Page 3 (User data with specific EPC code), enter:
}Lb,a:3,d:220000000000000000000003!
Using the Wv Command
The Wv command is a multifunction command that performs any erase, write, and
verification needed to program a tag in a specific protocol. The command can also lock the
data.
The format of the
Wv
command is as follows:
}Wv,b:<EPC data>,k:<kill code>,m:<lock mask>!
where:
b:<EPC data>
is the EPC ID to write to the tag.
k:<kill code>
is the kill code to be written to the reader.
m:<lock mask>
is the lock mask to indicate which tag field to lock. Each 4-bit
nibble in the mask indicates the lock state to apply to a specific part of the tag. A mask
nibble value of 1 locks the specific part of the tag. A mask nibble value of 0 indicates
no lock is applied.
For the EPC0 protocol, the mask nibbles apply to the following fields:
To write an EPC ID value of 332233445566778899aabbcc and verify the write, enter:
}wv,b:332233445566778899aabbcc!
To write the EPC ID data and lock the data, enter:
}wv,b:332233445566778899aabbcc,m:1!
Mask Nibble
4
3
2
1
0
Tag Field
Unused
Unused
Unused
Kill code
EPC data
Summary of Contents for MP9311 Series
Page 1: ...User s Guide MP9311 Low Power UHF Reader Module THE POWER TO CHOOSE...
Page 6: ...MP9311 User s Guide iv...
Page 12: ...MP9311 User s Guide 6...
Page 34: ...MP9311 User s Guide 26...
Page 58: ...MP9311 User s Guide 50...
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