R f s, I c s – Atmel AT88RF020 User Manual
Page 2
Atmel’s AT88RF020 low-cost 2-Kbit RF Transponder EEPROM Smart Card IC is fully
compliant with the Type B requirements of ISO/IEC 14443. This chip is powered by the
RF interface, so a battery is not needed. A tuning capacitor is included on-chip so only
a single external coil antenna is required to operate the device. The AT88RF020 is
compatible with any Type B RF Smart Card Reader.
Security
AT88RF020 has several security features. A 64-bit password protects the 224-byte user memory
which cannot be read or written unless the correct password has been presented. Write Lock bits
protect critical data from being over-written. Each Lock bit protects an 8-byte page, so once the
Lock bit is set the data can never be changed. The AT88RF020 features a one-way transaction
counter that allows tracking of individual device usage. The counter is set at the factory to zero
and is incremented by a COUNT command that simultaneously writes the Signature field. The
counter can never be reset or decremented. Atmel uniquely serializes each device with a 32-bit
read-only serial number.
Memory Map
AT88RF020 contains 256 bytes of memory configured as shown below. The first three pages can
always be read by the system. Page 3 is the password and can never be read. Pages 4 thru 31
are the user memory area that can only be accessed after password validation.
Product Features
•
Contactless 13.56 Mhz RF Communications
Interface
–
ISO/IEC 14443-2:2001 Type B Compliant
–
ISO/IEC 14443-3:2001 Type B Compliant
Anticollision Protocol
–
Command Set Optimized for Multicard RF
Communications
–
Tolerant of Type A Signaling for
Multiprotocol Applications
–
Operating Distance of 10 cm or more
•
Integrated Tuning Capacitor
•
256 Byte EEPROM Memory
•
8-Byte Page Write Mode
•
224-Bytes User Memory
•
5 mS Write Time
•
Security Features
–
Unique Read-only PUPI Serial Number
–
64-bit Password
–
One-way Transaction Counter
–
Write Lock Data Protection
•
High Reliability
–
Endurance: 100,000 Write Cycles
–
Data Retention: 10 Years
–
Operating Temperature: 0°C to 70°C
Package Options
© Atmel Corporation 2003. All rights reserved.
Atmel® and combinations thereof are registered
trademarks of Atmel Corporation or its subsidiaries.
Other terms and product names may be the
trademarks of others.
REV: 2038B-08/03/7K
B
YTE
0
B
YTE
1
B
YTE
2
B
YTE
3
B
YTE
4
B
YTE
5
B
YTE
6
B
YTE
7
Page 0
[
Unique Tag ID
]
[
Lock Bits
]
Page 1
[
Application Data
]
[
Reserved
]
Page 2
[
Signature
]
[
Counter
]
Page 3
[
Password
]
Page 4
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R
E A D
/ W
R I T E
R F S
M A R T
C
A R D
I C
S
E C U R E
R F
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Wafer Form, Thinned to 6 Mils
RF Smart Card Modules
Prelaminate Sheets
Development Tools
AT88RF020-DK Development Kit, including RF reader and software
Atmel Contact: [email protected]