MP9311 User’s Guide
38
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>,u:<user memory>,m:<lock mask>!
where:
b:<EPC data>
is the EPC ID to write to the tag.
u:<user memory>
is the user data to be written to the tag. The number of bytes
varies depending on the tag.
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 ISO18000-6B 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
User Memory
Unused
Unused
Unused
EPC data
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