R
EM4223
Tags that match the MASK
value of MASK length will
move to the ROUND_ACTIVE
state from the
Begin-
Round
Always = 0
OB
SUID
1 bit
Round
size
3 bits
5 bits
Mask
length
Mask
value
0-136
bits
16 bits
8 bits
ROUND_STANDBY or
READY states or will remain
in the ROUND_ACTIVE state
if already there. Tags that do
not match the Mask will move
to the READY from either
ROUND_ACTIVE or
ROUND_STANDBY states.
SUID = 0 tag responds with
the 128 bits of user data.
SUID = 1 tag responds with
SUID, where the DSFID field
is replaced by AFI field. Also
moves Transponders already
active in FST mode to ISO
mode.
Wake-Up-
FST
Always = 0
39
SUID
1 Bit
Round
size
5 bits
Wakes tag up in the Fast
Supertag™ mode. Also
3 bits
moves tags already active in
ISO mode to FST mode. SUID
= 0 tag responds with the 128
bits of user data SUID = 1 tag
responds with SUID.
Mute
Low
Pulse
Implied command in FST
mode. When tag receives an
SOF it moves to the
ROUND_STANDBY state.
The tag returns to the active
state on receipt of a next-slot
or init-round or new-round
command, or when a period of
2.5 X 176 tag bit periods has
elapsed since the last Mute
command (176 bits =
maximum message length).
Table 5- Supported Commands
Mandatory ISO commands op-codes are marked with an * and command titles are in bold type face.
8
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