R

EM4223

Copyright

© 2005, EM Microelectronic-Marin SA

8

www.emmicroelectronic.com

Begin-

Round

Always = 0

OB

SUID

1 bit

Round

size

3 bits

5 bits

Mask

length

8 bits

Mask

value

0-136

bits

16 bits

Tags that match the MASK

value of MASK length will

move to the ROUND_ACTIVE

state from the

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

3 bits

5 bits

Wakes tag up in the Fast

Supertag™ mode. Also

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.