EM4223V2WW11E datasheet, PDF - EEWORLD Datasheet

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EM4223V2WW11E: DescriptionRead-only UHF Radio Frequency Identification Device; File Size426KB，29 Pages; ManufacturerEMMICRO; Websitehttp://www.emmicroelectronic.com

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EM4223V2WW11E Overview

Read-only UHF Radio Frequency Identification Device

EM4223V2WW11E Preview

EM MICROELECTRONIC -

MARIN SA

EM4223

Read-only UHF Radio Frequency Identification Device

according to ISO IEC 18000-6

Description

The EM4223 chip is used in UHF passive read-only

transponder applications. The chip derives its operating

power from an RF beam transmitted by the reader, which

is received and rectified by the chip. It transmits its

factory-programmed code back to the reader by varying

the amount of energy that is reflected from the chip

antenna circuit (passive backscatter modulation).

The air interface communication protocol is implemented

according to ISO18000-6 type A.

The code structure supports the effort of EPCglobal, Inc.

as an industry accepted standard.

It additionally incorporates the Fast Counting

Supertag™ protocol for applications where the fast

counting of large tag populations is required.

The chip is frequency agile, and can be used in the

range of 800 MHz to 2.5GHz for RF propagating field

applications.

Features

Air interface is ISO18000-6 type A compliant

Supports EAN•UCC and EPC™ data structures as

defined by the Auto-ID center

Supports Fast Counting Supertag™ mode

128 bit user memory license plate Group select by

means of ‘Application Family Identifier’ (AFI)

according to ISO

Fast reading of user data during arbitration (no need

to first take an inventory)

Specific command set for supply chain logistics

support.

Frequency independent: Typically used at 862 - 870

MHz, 902 - 950 MHz and 2.45 GHz

Low voltage operation - down to 1.0 V

Low power consumption

Cost effective

-40 to +85°C operating temperature range

Typical Applications

Supply chain management (SCM)

Tracking and tracing

Asset control

Licensing

Auto-tolling

Benefits

Numbering scheme according to international

standards

Operates worldwide according to the local radio

regulation

Ideal for applications where long range and high-

speed item identification is required

Key words

ISO 18000-6A

UHF

EPC™ data structure

Fast Supertag™

Typical Operating Configuration

A+

Connect pad A+

And V

to a

dipole antenna

EM4223

Fig. 1

Chip design is a joint development with RFIP Solutions Ltd

2004, EM Microelectronic-Marin SA

www.emmicroelectronic.com

EM4223

Table of contents

READ-ONLY UHF RADIO FREQUENCY

IDENTIFICATION DEVICE ACCORDING TO

ISO IEC 18000-6.................................................1

COMMANDS AND STATES............................ 23

43H

Description .................................................................. 1

Typical Applications .................................................... 1

Key words ...................................................................1

Benefits .......................................................................1

Commands ............................................................... 23

Tag States................................................................ 23

Tag state storage ..................................................... 24

45H

46H

10. COLLISION ARBITRATION............................ 25

47H

TABLE OF CONTENTS .....................................2

Absolute Maximum Ratings ........................................ 3

Handling Procedures .................................................. 3

Operating Conditions .................................................. 3

Block Diagram............................................................. 3

Electrical Characteristics............................................. 4

Timing Characteristics ................................................ 4

10H

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

48H

49H

50H

51H

52H

53H

GENERAL DESCRIPTION.................................5

12H

FUNCTIONAL DESCRIPTION ...........................5

13H

General Command Format ......................................... 6

Supported Command set ............................................ 6

14H

15H

BASIC COMMAND FORMATS..........................6

16H

Short commands......................................................... 6

Extended commands .................................................. 6

Implied MUTE command (Fast Supertag Mode only) . 7

Command state transitions ....................................... 11

17H

18H

19H

20H

GENERAL REPLY FORMAT ...........................14

21H

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

23H

24H

25H

26H

27H

28H

29H

30H

RETURN LINK DATA ENCODING -

TRANSPORTER TO READER ........................18

31H

Return link data encoding ......................................... 18

Return link preamble................................................. 19

Cyclic Redundancy Check (CRC) ............................. 19

32H

34H

MEMORY ORGANISATION AND

CONFIGURATION INFORMATION .................19

35H

Memory Map ............................................................. 19

Unambiguous User Data (UUD) & SUID................... 19

AFI ............................................................................ 20

Personality Block ...................................................... 20

36H

37H

38H

39H

TRANSPONDER SELECTION OPERATION –

INIT_ROUND AND BEGIN_ROUND

COMMANDS.....................................................21

40H

INIT_ROUND COMMAND SELECTION OPERATION

.................................................................................. 21

BEGIN_ROUND COMMAND SELECTION

OPERATION ............................................................. 22

41H

42H

2005, EM Microelectronic-Marin SA

www.emmicroelectronic.com

EM4223

Absolute Maximum Ratings

Parameter

Supply Voltage

– V

(V)

Storage temperature (°C)

RMS supply current pad A (mA)

Symbol

store

Min

-0.3

-50

Max

+3.6

+150

Table 1

Handling Procedures

This device has built-in protection against high static

voltages or electric fields; however, anti-static precautions

must be taken as for any other CMOS component. Unless

otherwise specified, proper operation can only occur when

all terminal voltages are kept within the voltage range.

Unused inputs must always be tied to a defined logic

voltage level.

Stresses above these listed maximum ratings may cause

permanent damages to the device. Exposure beyond

specified operating conditions may affect device reliability or

cause malfunction.

Operating Conditions

Parameter

Supply voltage

Operating Temperature

Symbol Min

1.0

-40

Max

3.5

+85

Unit

°C

Table 2

Block Diagram

Data

ROM 128b

AFI

ROM 8b

PON

Limit

Ant

LOGIC

OSC

Data

extractor

Fig. 2

2005, EM Microelectronic-Marin SA

www.emmicroelectronic.com

EM4223

Electrical Characteristics

= 2.0V, T

=+25°C, unless otherwise specified

Parameter

Symbol

Operating voltage

– V

Current consumption

Power On Reset Rising

ponr

Power On Reset Fall

ponf

Electrostatic discharge

HBM to MIL-STD-

883 method 3015

Internal oscillator

frequency

Input series Impedance

@900MHz

Modulation depth

decoding

Conditions

-V

= 1.5 V

Min.

ponf

Typ.

2.0

1.2

1.0

1.5

0.5

192

Max.

3.5

3.9

Unit

KHz

Table 3

and V

pad

A+ pad

Over full temperature range

– V

< 1V

At typical pulse width

320

0.620

448

27 %

100 %

Timing Characteristics

Over full voltage and temperature range, unless otherwise specified

Parameter

Symbol

Conditions

Forward Link

average

(Reader to Transponder)

Pulse width

100% modulation depth

Pulse interval Data 0

pi0

100% modulation depth

Pulse interval Data 1

pi1

100% modulation depth

Return Link

(Transponder to Reader)

(note 1)

Bit rate accuracy

short term (note 2)

Bit rate accuracy

long term @1.5V

to Receive

turn-around time

Receive to

turn-around time

Tag Command window

nominal at 25°C as selected by

factory programmed Personality Bit

During a message transmission

of nominal 40kb/s

Min.

Typ.

160

+/- 1

+/- 15

Depends on Transponders chosen

reply slot

Opens at the start of the 3

bit

clock period after the end of the

last bit transmitted by the

Transponder to the reader. Closes

in the middle of the 5

bit clock

period.

150

Max.

Unit

kbps

Bit

times

Note 1: V

= 2.0V, T

=+25°C

Note 2: V

= 2.0V

Table 4

2005, EM Microelectronic-Marin SA

www.emmicroelectronic.com

EM4223

1. GENERAL DESCRIPTION

The EM4223 is a monolithic integrated circuit transponder

for use in UHF passive backscatter RFID applications.

Operating power for the transponder circuit is derived

from the illuminating RF field of an RFID Reader by

means of an on-chip virtual battery rectifier circuit.

A user specified license plate or tag identifier is factory

programmed into the transponder by means of laser

trimming. This data is communicated to the reader by

means of backscatter modulation of the illuminating RF

carrier wave.

The EM4223 supports both the ISO18000-6 type A and

the Fast Supertag™ (FST) Protocols. The EM4223 may

be configured to wake-up in either of these modes

according to user requirements. Once active, the

transponder will automatically respond to either protocol

(and eventually switch modes) on receipt of the

appropriate commands.

All commands received from the Reader will have an

immediate effect on the Transponder. In addition, certain

commands will have a persistent effect. The possible

immediate effects are one or both of the following:

A change of State (see Fig. 19)

A Data Message sent to the Reader.

The possible persistent effects are:

Data Messages to the Reader will contain SUID (as

described later in this section) or Data Messages to

the Reader will contain USER DATA of 128 bits,

The Round Size (Number of Slots) over which all of

the Transponders in the population will spread their

Data Messages to the Reader will be configured.

The Transponder will switch between ISO and FST

modes of operation (as described below).

A sub-population of Transponders will be enabled to

send Data Messages to the Reader dependent on

either the AFI or on all or a portion of the USER

DATA of 128 bits.

2. FUNCTIONAL DESCRIPTION

When a Transponder is placed in the RF energising field

of a Reader it powers up. When the power supply has

reached the correct operating voltage, the Configuration

programmed personality flags. Depending on the state of

these wake-up flags, the Transponder will be placed in

either ISO 18000-6 Type A (ISO) or Fast Supertag (FST)

mode and in one of three states: READY, ACTIVE or

ROUND_STANDBY. After this process is complete the

Transponder is able to receive commands and to transmit

data to the Reader.

The Transponder is half-duplex and is thus in either

receive mode (default) or transmit mode. When not

actively transmitting messages to the Reader on the

Return Link, the Transponder will wait for the start of a

new command, which will be detected as a quiet period of

specific duration, followed by a valid Start Of Frame

(SOF) symbol (see Fig. 11). The Transponder requires

the quiet period in order to ensure that it does not detect

partial transmissions by a reader as a valid command.

This can occur if a transponder enters the field of a reader

and powers up part through a reader transmission. The

received SOF symbol is used to calibrate the command

decoder every time a command is received. This

calibration is used to establish a pivot to distinguish

between subsequent data ‘0’ and data ‘1’ symbols. Each

time that a new command is received by the Transponder,

the SOF re-calibrates the decode counter thereby

compensating for any variation in the Transponder clock

frequency due to changes in RF excitation levels or

temperature variations. The circuit has been designed to

accommodate a Transponder clock frequency variation of

+/-40% from nominal. When the Transponder is

transmitting the receive circuitry is disabled.

54H

The start of a command from the Reader has a special

significance if a Transponder is operating in the FST

mode and is in the ROUND_ACTIVE state. When the

falling edge of the first symbol of a command (SOF) is

received by a Transponder in the ROUND_ACTIVE state

while in FST mode, it will immediately move to the

ROUND_STANDBY state. If a command is successfully

received, the Transponder will move back to the

ROUND_ACTIVE state. If the Transponder does not

receive a valid command it will remain in the

ROUND_STANDBY state until a valid command has been

received. This enables the Reader to silence all

Transponders that have not already started sending their

Data Messages to the Reader in compliance with the FST

protocol. It is important to note that the Reader does not

have to send a full command or indeed even a part of a

command, as long as it sends a low going pulse of

approximately ½ Tari (Type A Reference Interval Time)

duration.

An important feature of this transponder is its ability to

switch seamlessly between ISO mode and FST mode

whatever its “wake up” personality setting, depending only

on the mode or characteristics of the controlling reader. A

Transponder that “wakes up” in the ISO mode on power-

up will switch to the FST mode if it receives a

Wake_Up_FST command. Similarly, a Transponder that

“wakes up” in the FST mode on power-up will switch to

the ISO mode if it receives an INIT-ROUND, INIT-

ROUND-ALL or BEGIN-ROUND command.

2005, EM Microelectronic-Marin SA

www.emmicroelectronic.com

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