The electronic seal mandatory data includes seal id, seal status, battery status,
details on the sealing and opening times, and protocol information. The seal id is a
combination of the tag manufacturer id and the tag id and is used to uniquely
identify the seal. It is permanently programmed into the seal during manufacturing. The
seal status indicates the open, closed, or sealed state of the seal.
Figure 3.31 shows the interrogator to tag command=response formats for the Sleep All
But and Get Seal Model commands. The command contains ?¬?elds such as a protocol to
identify the data link layer packet structures, an opcode code to identify the command, and
options to indicate whether it is a point-to-point or a broadcast command and whether
the command duration ?¬?elds are present. The command duration ?¬?elds are speci?¬?ed by
the interrogator in point-to-point commands so that the tag may switch to sleep mode after
waiting for the described duration. The Sleep All But command is a broadcast command. In
response to this command, the speci?¬?ed seal remains awake while all the other seals return
to sleep mode. This command does not require a response back to the interrogator. In the
TABLE 3.6
Power and Energy Results for Implementing Query, Collection,
and 10 ISO Part 7 Primitives (Inclusive of Collection)
as a 0.16 mm ASIC
Primitives Dynamic Power (mW) Area (100 mm2)
Query 0.
Pages:
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138