
R
EM4223
Copyright
2005, EM Microelectronic-Marin SA
13
www.emmicroelectronic.com
Command : Next_Slot
Initial State
Ready
Quiet
Criteria
Action
New State
Ready
Quiet
None
None
None
None
Tag has answered in previous slot, AND
Signature matches AND 1
low pulse of
Next_Slot command was received in the
acknowledgement time window.
Tag is in
ISO Mode
and has NOT
answered in previous slot, OR Signature
does not match OR 1
low pulse of
Next_Slot command was not received in
the acknowledgement time window.
Tag is in
FST Mode
and has NOT
answered in previous slot, OR Signature
does not match OR 1
low pulse of
Next_Slot command was not received in
the acknowledgement time window.
ISO Mode
None
Quiet
The tag shall increment its slot counter
and send its response if slot counter
matches the chosen slot.
Round_Active
Round_Active
The tag will automatically increment is
Current Slot Counter at internally
determined times and send its response
if the its Current Slot Counter matches its
Selected Slot Register.
The tag shall increment its slot counter
and send its response if slot counter
matches the chosen slot.
The tag resumes the FST Arbitration
process and will automatically increment
is Current Slot Counter at internally
determined times and send its response
if the its Current Slot Counter matches its
Selected Slot Register.
Table 12 - Tag state transitions for Next_Slot
Round_Active
Round_active
Round_Standby
FST Mode
Round_active
Command : Close_slot
Initial State
Ready
Quiet
Criteria
Action
New State
Ready
Quiet
None
None
None
None
ISO Mode
The tag shall increment its slot counter
and send its response if slot counter
matches the chosen slot.
The tag will automatically increment is
Current Slot Counter at internally
determined times and send its response
if the its Current Slot Counter matches its
Selected Slot Register.
The tag shall increment its slot counter
and send its response if slot counter
matches the chosen slot.
The tag resumes the FST Arbitration
process and will automatically increment
is Current Slot Counter at internally
determined times and send its response
if the its Current Slot Counter matches its
Selected Slot Register.
Table 13 - Tag state transitions for Close_Slot
Round_Active
Round_Active
FST Mode
Round_Active
ISO Mode
Round_active
Round_Standby
FST Mode
Round_active
Command : Reset_To_Ready
Initial State
Ready
Quiet
Round_Active
Round_Standby
Criteria
Action
New State
Ready
Ready
Ready
Ready
None
None
None
None
None
None
None
None
Table 14 - Tag state transitions for Reset_To_Ready