Kill tag (26h), Release version 1.0.34, Action – ThingMagic M5e-Compact User Manual
Page 238
Release Version 1.0.34
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Appendix D: Deprecated and Modified Commands
Where a Mask bit is specified as “L,” a “1” in that bit indicates that the corresponding bit in
the Action field is set or cleared. A “0” indicates that the corresponding bit in the Action
field should be ignored.
Where an Action bit is specified as “R/W,” a “1” indicates that reading and writing should
be locked. A “W” indicates that only writing should be locked.
Note
Adding ‘0000’ in the
Action
field unlocks the memory bank.
A “Perm” bit sets the permalock state of the corresponding “R/W” or “W” bit, which
permanently programs the lock status of that bit on the tag. An Action bit has no effect
unless the corresponding Mask bit is set. An “X” in the above table indicates an ignored
bit. For more detailed information about these fields, please refer to the Gen2
specification.
A tag whose access password is zero transitions directly from the acknowledged state to
the secured state without first stopping in the open state. No password check is required.
In other words, locking a tag has no effect if its access password is set to zero (unless it is
permalocked). The access password can be set using the Write Tag Data command.
Kill Tag (26h)
The Kill Tag command kills a tag. Since each protocol has a different format for the kill
command, this is highly protocol dependent. As each new kill command becomes
available, the message structure will be documented in this section.
For the GEN2 protocol, the following command format is used.
First Byte (0x11 above)
Second Byte (0x22 above)
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Unused
Kill Pwd
Access Pwd
EPC Mem
TID Mem
User Mem
Mask
X
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
Actio
n
X
X
X
X
X
X
R/W
Perm
R/W
Perm
W
Perm
W
Perm
W
Perm