R
EM4223
Command : Begin_Round (Tag will be in ISO mode after this command)
Initial State
Ready
Criteria
Action
New State
Number of bits of the MASK specified by
MASK_LENGTH in the command matches the
data in the Tag (AFI followed by USER DATA).
If the 1st 8 bits of the MASK = 0 they are not
compared.
Tag chooses a random slot in which it
will send its response. Tag’s Current Slot
Counter is reset to first slot.
Round_Active
Number of bits of the MASK specified by
MASK_LENGTH in the command does not
match the data in the Tag.
None
Ready
Quiet
None
None
Quiet
Round_Active
Number of bits of the MASK specified by
MASK_LENGTH in the command matches the
data in the Tag (AFI followed by USER DATA).
If the 1st 8 bits of the MASK = 0 they are not
compared.
Tag chooses a new random slot in which
it will send its response. Tag’s Current
Slot Counter is reset to first slot.
Round_Active
Number of bits of the MASK specified by
MASK_LENGTH in the command does not
match the data in the Tag.
None
Ready
Round_Standby
Number of bits of the MASK specified by
MASK_LENGTH in the command matches the
data in the Tag (AFI followed by USER DATA).
If the 1st 8 bits of the MASK = 0 they are not
compared.
Tag chooses a new random slot in which
it will send its response. Tag’s Current
Slot Counter is reset to first slot.
Round_Active
Number of bits of the MASK specified by
MASK_LENGTH in the command does not
match the data in the Tag.
None
Ready
Table 10 – Tag state transitions for Begin_Round
Command : Wake_Up_FST (Tag will be in FST mode after this command)
Initial State
Ready
Criteria
Action
New State
None
Tag chooses a random slot in which it
will send its response. Tag’s Current Slot
Counter is reset to first slot.
Round_Active
Quiet
Round_Active
None
None
None
Quiet
Round_Active
Tag chooses a new random slot in which
it will send its response. Tag’s Current
Slot Counter is reset to first slot.
Tag chooses a new random slot in which
it will send its response. Tag’s Current
Slot Counter is reset to first slot.
Round_Standby
None
Round_Active
Table 11 – Tag state transitions for Wake_Up_FST
12
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