R
EM4223
Command : Standby_Round
Initial State
Ready
Quiet
Round_Active
Round_Standby
Criteria
Action
New State
Ready
Quiet
None
None
None
None
None
None
None
None
Round_Standby
Round_Standby
Table 15 – Tag state transitions for Standby_Round
4. GENERAL REPLY FORMAT
The Transponder will reply to a successful arbitration sequence by sending a message having the following format:
Preamble – see description of the Return Link.
Flags – 2 bits (Preset)
Parameters as follows:
Transponder type – 1 bit (Always = 0)
Battery status – 1 bit (Always = 0)
Signature – 4 bits (last 4 bits of the clock counter).
Data – 136 bits if the SUID bit = 0 as follows:
AFI of 8 bits.
User Data of 128 bits.
Data – 48 bits if the SUID bit = 1 as follows:
DSFID of 8 bits.
SUID of 40 bits (lower 32 bits of User Data + IC Manufacturer code).
CRC – 16 bits
Preamble
Flags
Parameters
Data
CRC
Fig. 5- Transponder Reply, general format
Preamble
Flags Trans. Type
2 bits Always = 0
Battery
Status
Signature
4 bits
AFI
8 bits
USER DATA
128 bits
CRC16
16 bits
Always = 0
Fig. 6 – Transponder Reply to commands with the SUID flag = 0.
The above reply will be received after a successful arbitration sequence that was initiated by the Init-Round, Init-Round-
All, Begin_Round and Wake-Up_FST commands with the SUID flag = 0.
Preamble
Flags
2 bits
Trans. Type Battery Status
Always = 0 Always = 0
Signature
4 bits
DSFID
SUID
CRC 16
16 bits
Always = 0x00
40 bits
Fig. 7 – Transponder Reply commands with the SUID flag = 1.
The above reply will be received after a successful arbitration sequence that was initiated by the Init_Round,
Init_Round_All and Wake_Up_FST commands with the SUID flag = 1.
Preamble
Flags
2 bits
Trans. Type Battery Status
Always = 0 Always = 0
Signature
4 bits
AFI
SUID
CRC 16
16 bits
8 bits
40 bits
Fig. 8 – Transponder Reply to Begin_Round command with the SUID flag = 1.
The above reply will be received after a successful arbitration sequence that was initiated by the Begin_Round command
with the SUID flag = 1.
14
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