R
EM4223
Table of contents
READ-ONLY UHF RADIO FREQUENCY
9. COMMANDS AND STATES............................ 23
Commands............................................................... 23
Tag States................................................................ 23
Tag state storage ..................................................... 24
IDENTIFICATION DEVICE ACCORDING TO
ISO IEC 18000-6.................................................1
Description..................................................................1
Typical Applications ....................................................1
Key words ...................................................................1
Benefits.......................................................................1
10. COLLISION ARBITRATION............................ 25
General explanation of the collision arbitration
mechanism............................................................... 25
FST SYSTEMS ........................................................ 25
FST MODE OPTIONS.............................................. 26
Use of the round_size function (ISO & FST modes). 27
Ordering Information ................................................ 29
Versions ................................................................... 29
TABLE OF CONTENTS .....................................2
Absolute Maximum Ratings ........................................3
Handling Procedures ..................................................3
Operating Conditions ..................................................3
Block Diagram.............................................................3
Electrical Characteristics.............................................4
Timing Characteristics ................................................4
1. GENERAL DESCRIPTION.................................5
2. FUNCTIONAL DESCRIPTION...........................5
General Command Format .........................................6
Supported Command set ............................................6
3. BASIC COMMAND FORMATS..........................6
Short commands.........................................................6
Extended commands ..................................................6
Implied MUTE command (Fast Supertag Mode only) .7
Command state transitions .......................................11
4. GENERAL REPLY FORMAT...........................14
5. FORWARD LINK ENCODING - READER TO
TRANSPONDER ..............................................15
Carrier modulation pulses .........................................15
Basic time interval – definition of “Tari”.....................15
Data coding...............................................................16
Data Frame format....................................................16
Data decoding...........................................................17
Bits and byte ordering...............................................17
Reader to Transponder 5 bit CRC (CRC-5) ..............17
Command Decoder...................................................17
6. RETURN LINK DATA ENCODING -
TRANSPORTER TO READER ........................18
Return link data encoding .........................................18
Return link preamble.................................................19
Cyclic Redundancy Check (CRC).............................19
7. MEMORY ORGANISATION AND
CONFIGURATION INFORMATION .................19
Memory Map.............................................................19
Unambiguous User Data (UUD) & SUID...................19
AFI ............................................................................20
Personality Block ......................................................20
8. TRANSPONDER SELECTION OPERATION –
INIT_ROUND AND BEGIN_ROUND
COMMANDS.....................................................21
INIT_ROUND COMMAND SELECTION OPERATION
..................................................................................21
BEGIN_ROUND COMMAND SELECTION
OPERATION .............................................................22
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