Datasheet 2dc20 DATASHEETS

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INTEGRATED CIRCUITS

DATA SH EET

HT2 DC20 S20

HITAG

Product speciﬁcation Revision 2.0

2 Transponders

March 1998

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Philips Semiconductors Product speciﬁcation Revision 2.0

HITAGTM2 Transponders

CONTENTS

1 FEATURES 2 GENERAL DESCRIPTION 3 ORDERING INFORMATION 4 QUICK REFERENCE DATA 5 BLOCK DIAGRAM 6 GENERAL FUNCTIONAL DESCRIPTION

6.1 Memory Organization

6.2 Operation Modes and Configuration

6.2.1 Modes of Operation

6.2.2 Status Flow

6.2.3 Configuration

6.3 Configuration of Delivered Transponders

6.4 Definition of Passwords and Keys 7 LIMITING VALUES 8 ELECTRICAL CHARACTERISTICS 9 MECHANICAL CHARACTERISTICS 10 DEFINITIONS 11 LIFE SUPPORT APPLICATIONS

HT2 DC20 S20

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HITAGTM2 Transponders

1 FEATURES

• Identification Transponder for use in contactless applications

• Operating frequency 125 kHz

• Data transmission and supply energy via RF link, no

internal battery

• Reading distance same as writing distance

• Non volatile memory of 256 bits (128 bits user data,

128 bits control data/secret memory) organized in 8 pages, 4 bytes each

• 10 years non-volatile data retention

• >100000 erase/write cycles

• Selective read/write protection of memory content

• Two coding schemes for read operation:

Biphase and Manchester coding

• Effective communication protocol with outstanding data integrity check

• Mutual authentication function

• Read/write mode allows:

– plain data transmission (password check) – encrypted data transmission (crypto mode)

• In read/write mode multi-tag operation possible because of special HALT-function

• Emulation of standard industrial read-only transponders: – Public Mode A

(MIRO and transponders from µEM (H400x))

– Public Mode B

(according to ISO 11784 and ISO 11785 for animal identification)

– Public Mode C (PIT compatible mode)

HT2 DC20 S20

2 GENERAL DESCRIPTION

The HT2DC20S20 is a high performance transponder for bi-directional transmission in half duplex mode between read/write device and transponder.

Data are stored in the transponder in a non-volatile memory (EEPROM). The transponder requires no internal power supply; it derives its power from the magnetic component of the RF carrier frequency generated by the reader. Data are transmitted by modulating this carrier.

The HT2DC20S20 is dedicated for use in secure access systems where the transponder and the reader have to identify each other. The choosable use of cryptography enables highest data security. Providing several operating modes (password, crypto, standard read only modes) the versatile transponder can be used in various applications. The possible use of an installed reader base for read only transponders makes the additional use of HT2DC20S20 or the replacement of read only transponders by HT2DC20S20 very easy.

The HALT-command can be used after finishing data exchange to reach the halt-state. In this state the transponder is muted. This feature can be used to have steady RF field where single transponders are collected one by one. Each transponder is operated and then disabled so it does not interfere with the next transponder. The halt-state can only be exited by switching off/removing the magnetic field.

The EEPROM has a capacity of 256 bits and is organized in 8 pages of 4 bytes. The 8 pages are split up into 4 pages containing user data and into 4 pages for control of the memory access and for authentication purposes.

The pages of the transponder memory can be protected against read or write access by setting corresponding memory flags.

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Absorption modulation is used to transmit data from the transponder to the reader. The transponder absorbs the magnetic field which hence modulates the current in the reader antenna. Data transmission to the HT2DC20S20 uses binary pulse length modulation (BPLM).

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HITAGTM2 Transponders

3 ORDERING INFORMATION

EXTENDED TYPE NUMBER IC VERSION PACKAGE DRAWING

HT2 DC20 S20/F VLOCS1 V0 SOT385-1 SOT385BA3 −40 to +85

4 QUICK REFERENCE DATA

PARAMETER VALUE UNIT

Carrier frequency 125 kHz (typical) Data transmission mode half-duplex Transfer rate

• transponder -> reader

• reader -> transponder

Coding

• transponder -> reader

• reader -> transponder

Modulation ASK (amplitude shift keying) Memory size 256 byte Memory organization 8 (blocks) page (each 16 byte) Encrypted mutual authentication

• Serial Number

• Secret Key

• Duration

4.0

5.2

Manchester / Biphase BPLM (binary pulse length modulation)

32 48 36

kbit/s kbit/s

bit bit ms

HT2 DC20 S20

TEMPERATURE

RANGE (°C)

Special features • user defined write protection

• unique 32 bit serial number for each transponder

• read only emulation function (µEM H400x family, ISO 11784 and 11785, PIT compatibility)

• encrypted data transmission possible

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HITAGTM2 Transponders

5 BLOCK DIAGRAM

CONTACTLESS INTERFACE

HT2 DC20 S20

RECTIFIER

VOLTAGE LIMITER

POWER-ON

RESET

HT2 DC20 S20

CONTROL LOGIC

DATA

ACQUISITION

EEPROM

ACCESS CONTROL

CLOCK

RECOVERY

MODULAT OR

DEMODULAT OR

TRANSPONDER IC

CALCULATION UNIT

EEPROM

Fig.1 Blockdiagram transponder.

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HITAGTM2 Transponders

6 GENERAL FUNCTIONAL DESCRIPTION

6.1 Memory Organization

The memory of the transponder consists of 256 bits EEPROM memory and is organized in 8 pages with 32 bits each.

Depending on the operation mode the EEPROM is organized as described in the following.

Table 1 Memory organization

PAGE CONTENT

Crypto Mode:

0 Serial Number 1 32 LSBs of 48 bit key 2 16 MSBs of 48 bit Key, 16 bit reserved 3 8 bit Conﬁguration, 24 Bit Password TAG 4 read/write page 5 read/write page 6 read/write page 7 read/write page

Password Mode:

0 Serial Number 1 Password RWD 2 reserved 3 8 bit Conﬁguration, 24 bit Password TAG 4 read/write page 5 read/write page 6 read/write page 7 read/write page

HT2 DC20 S20

6.2.1 MODES OF OPERATION The HT2DC20S20 can be operated in several modes.

Crypto Mode:

Mode for writing or reading the transponder with encrypted data transmission.

Password Mode:

Mode for writing or reading the transponder with plain data transmission.

Public Mode A (Manchester):

Read only mode emulating Philips MIRO transponders resp. mEM H400x transponders. The 64 bits of the user Pages 4 and 5 are cyclically transmitted to the read/write device.

Public Mode B (Biphase):

Read only mode according to ISO standards 11784 and 11785 for animal identification.

The 128 bits of the user Pages 4 to 7 are cyclically transmitted to the read/write device.

Public Mode C (Biphase):

Read only mode emulating the read operation of the PCF793X (with a slightly different Program Mode Check). In the Public Mode C the 128 bits of the user Pages 4 to 7 are cyclically transmitted to the read/write device.

6.2.2 S After entering the RF-field the transponder waits for a

command to start the authentication. After issuing this command the mutual authentication

takes place, followed by read- and write commands.

TATUS FLOW

6.2 Operation Modes and Conﬁguration

With the Configuration Byte the operation mode and the access rights to the memory can be selected. During Power-Up of the transponder the Configuration Byte is read from the EEPROM of the transponder.

If you change the configuration, keys or passwords, you have to place the transponder directly on the antenna (0-distance)! In order to avoid any errors do not move the transponder during this write process and be sure that you are in a safe environment without electrical noise.

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In password mode the data transfer occurs plain, in crypto mode data are encrypted.

The halt mode can be entered for muting a transponder. If the transponder is configured in one of the public modes,

these modes are entered automatically after a certain waiting time and data pages are sent cyclically to the read/write device.

By issuing the command to start the authentication during the waiting time also public mode transponders can be brought into the authorized state.

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HITAGTM2 Transponders

ENTERING PUBLIC MODES

(if conﬁgured)

READ-ONLY

RF-FIELD APPLIED

WAIT

START AUTHENTICATION

AUTHORIZED

HALT

HT2 DC20 S20

READ, WRITE

COMMANDS

Fig.2 Status flow.

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HITAGTM2 Transponders

6.2.3 CONFIGURATION The Configuration Byte is represented by the first 8 bits of Page 3 of the transponder memory.

PAGE 3

BIT 31 BIT 24

CONFIGURATION BYTE

5 4 3 2 1 0

BIT 23 BIT0

PASSWORD TAG (24-BIT)

0: Manchester Code (does effect HITAG 2 Operation only) 1: Biphase Code (does effect HITAG 2 Operation only)

BIT 2 BIT 1 VERSION CODING

00 01 10 11

0: password mode 1: crypto mode

0: PAGE 6 and 7 read/write 1: PAGE 6 and 7 read only

0: PAGE 4 and 5 read/write 1: PAGE 4 and 5 read/write

THE SETTING OF THIS BIT IS OTP (One Time Programmable)!

0: PAGE 3 read/write 1: PAGE 3 read only; Conﬁguration Byte and Password TAG ﬁxed

THE SETTING OF THIS BIT IS OTP!

0: PAGE 1 and 2 read/write 1: PAGE 1 no read/no write

PAGE 2 read only (when transponder is in password mode) PAGE 2 no read/no write (when transponder is in crypto mode)

Public Mode B biphase depending on bit 0 Public Mode A manchester depending on bit 0 Public Mode C biphase depending on bit 0 HITAG 2 depending on bit 0 depending on bit 0

(2)

HT2 DC20 S20

CODING IN HITAG

2- OPERATION

(1)

(1) Do not set Bit 6 of the Configuration Byte to 1 before having written the final data into Page 3

(including the Configuration Byte and Password TAG) of the transponder.

(2) Do not set Bit 7 of the Configuration Byte to 1 before having written the final data into Pages 1

and 2 of the transponder.

Fig.3 Description of configuration byte.

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HITAGTM2 Transponders

Table 2 Standard values for the Conﬁguration Byte

NAME VALUE

Password Mode 0x06

Crypto Mode 0x0E Public Mode A 0x02 Public Mode B 0x00 Public Mode C 0x04

6.3 Conﬁguration of Delivered Transponders Table 3 Conﬁguration of Delivered Transponders

HT2DC20S20 transponders are delivered with the following conﬁguration:

NAME DESCRIPTION REMARK

Unique Serial Number:

Serial Number Read Only ﬁxed

Conﬁguration Byte:

0x06: Password Mode (Manchester Code) can be changed

Page 6 and 7 read/write Page 4 and 5 read/write Page 3 read/write Page 1 and 2 read/write

HT2 DC20 S20

Values for Transport Passwords, Transport Keys:

Password RWD: 0x4D494B52 (= “MIKR”) Password TAG: 0xAA4854 Key Low: 0x4D494B52 (= “MIKR”) Key High: 0x4F4E (= “ON”)

Note

1. Before delivering transponders to end users, Pages 1 to 3 should be locked (set Configuration Byte / Bit 6 to 1 for Page 3 and set Configuration Byte / Bit 7 to 1 for Pages 1 and 2).

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HITAGTM2 Transponders

6.4 Deﬁnition of Passwords and Keys

Keys are cryptographic codes, which determine data encryption during data transfer between read/write device and transponder. They are used to select a HT2DC20S20 transponder in Crypto Mode. The 16 bit KEY HIGH and 32 bit KEY LOW form one 48 bit key which has to be identical on both the transponder and the read/write device.

Passwords are needed to select a HT2DC20S20 transponder in Password Mode. There is one pair of passwords (Password TAG, Password RWD) which has to be identical both on the transponder and the read/write device.

• Password TAG:

– Password that the transponder sends to the

read/write device and which may be verified by the latter (depending on the configuration of the read/write device).

• Password RWD:

– Password that the read/write device sends to the

transponder and which is checked for identity by the latter.

HT2 DC20 S20

The passwords and keys are predefined by Philips by means of defined Transport Passwords and a Transport Key. They can be written to, which means that they can be changed (see also Chapter Configuration of Delivered HT2DC20S20 Transponders).

Note: Passwords and Keys only can be changed if their current values are known!

It is important that the following values are in accordance with each other, i.e. the respective data on the read/write device and on the transponder have to be identical pairs.

Table 4 HT2DC20S20 in Password mode:

ON THE READ/WRITE

DEVICE

Password RWD ⇔ Password RWD

As an option (depending on the conﬁguration of the read/write device):

Password TAG ⇔ Password TAG

Table 5 HT2DC20S20 in Crypto mode:

ON THE

READ/WRITE

DEVICE

KEY LOW ⇔ KEY LOW

KEY HIGH ⇔ KEY HIGH

As an option (depending on the conﬁguration of the read/write device):

Password TAG ⇔ Password TAG

ON THE

TRANSPONDER

ON THE

TRANSPONDER

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HITAGTM2 Transponders

7 LIMITING VALUES

All values are in accordance with the Absolute Maximum Rating System (IEC 134).

PARAMETER MIN. MAX. UNIT

number of erase/write cycles of the EEPROM 100000 data retention time of the EEPROM 10 years

• @ 55 °C operating temperature range −40 85 °C storage temperature range −55 125 °C magnetic ﬂux density (resistivity against

magnetic pulses) vibration 10 g

• 10 − 2000 Hz

• 3-axis

• IEC 68-2-6, Test Fc

shock 1500 g

• 3-axis

• IEC 68-2-27, Test Ea

0.2 T

HT2 DC20 S20

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HITAGTM2 Transponders

HT2 DC20 S20

8 ELECTRICAL CHARACTERISTICS

T0 = 8 ms (period length for f0 = 125 kHz). All parameters are guaranteed within the temperature range from

= −40°C to +85°C.

amb

All parameters are characterized with the SCEMTEC test equipment (STM-1), available from SCEMTEC, Reichshof-Wenrath, Germany.

SYMBOL PARAMETER CONDITION MIN. MAX. UNIT

RES

B B

W THR

resonance frequency 121.0 129.0 kHz bandwidth 2.3 kHz magnetic ﬂux density,

CARRIER

= 125 kHz 35 400

(1)

data transmission from transponder

PRG

AUTH

READ

IPRG

magnetic ﬂux density for programming the EEPROM

magnetic ﬂux density for mutual authentication

ﬁeld absorption due to the modulation of the transponder

modulation index (m) of the base station for programming and authentication

m = 0.95 f0 = 125 kHz t

= 8 T

LOW

m = 0.95 f0 = 125 kHz t

= 8 T

LOW

CARRIER

FIELD

CARRIER

FIELD

= 125 kHz

=35µT

= 125 kHz

=35µWb/m

pulse width 8 T

35 400

8 µT

95 100 %

(1)

µT

Note

1. Maximum available field strength of the test equipment. Transponder limit has not been characterized.

–()

maxBmin

max

min

-------------------------------------B

+()

maxBmin

readBmaxBmin

–=

Fig.4 Definition of modulation index.

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HITAGTM2 Transponders

HT2 DC20 S20

9 MECHANICAL CHARACTERISTICS

The transponder is sealed in epoxy resin moulding compound. The outline of the package is given in Fig.4. The designation of the package is SOT385-1.

PARAMETER VALUE UNIT

mechanical dimensions 12 x 6 x 3 mm protection class IP67 casting material epoxy resin

11.9-12.1 A

4.4 - 4.6

5.9-6.1

1.1-1.2

0.165

R 0.5 max.

all Radii, if not

otherwise specified

44˚-46˚ 

4.9-5.1

2.9-3.05

0-7˚ (5x)

Protruding plastic must not exceed

specified dimension by more than 0.2 mm

A

0-7˚ (5x)

Fig.5 Package outlines SOT385-1.

1.9-2.1

Cross Section A-A

( without Scale )

R 0.9-1.0

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HITAGTM2 Transponders

10 DEFINITIONS

Data sheet status

Objective speciﬁcation This data sheet contains target or goal speciﬁcations for product development. Preliminary speciﬁcation This data sheet contains preliminary data; supplementary data may be published later. Product speciﬁcation This data sheet contains ﬁnal product speciﬁcations.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the speciﬁcation is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the speciﬁcation.

11 LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so on their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale.

HT2 DC20 S20

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HITAGTM2 Transponders

HT2 DC20 S20

NOTES

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