AT88RF04C-MX1G Atmel, AT88RF04C-MX1G Datasheet - Page 6

• Manufacturer Part Number: AT88RF04C-MX1G
• Description: IC EEPROM 4KBIT 13MHZ TAG
• Manufacturer: Atmel
• Series: CryptoMemory®, CryptoRF®r

Specifications of AT88RF04C-MX1G

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO1444-2, 1444-3, 4-kbits
• Package / Case: RFID Tag, 13mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Password Verification
Passwords may be used to protect user zone read and/or write access. When a password is presented using the
Check Password command, it is memorized and active until power is removed unless a new password is presented or
a valid DESELECT or IDLE command is received. Only one password is active at a time, but write passwords also give
read access.
Authentication Protocol
The access to a user zone may be protected by an authentication protocol in addition to password dependent rights.
Passwords are encrypted in Authentication Communication Security mode. The authentication success is memorized
and active as long as the chip is powered, unless a new authentication is initialized or a valid DESELECT or IDLE
command is received. If the new authentication request is not validated, the card loses its previous authentication and it
must be presented again. Only the last request is memorized.
Encryption
The data exchanged between the card and the reader during Read, Write, and Check Password commands may be
encrypted to ensure data confidentiality.
The issuer may choose to protect the access to a user zone with an encryption key by settings made in the
configuration memory. In that case, activation of the Encryption Communication Security mode is required in order to
read/write data in the zone.
The encryption activation success is memorized and active as long as the chip is powered, unless a new initialization is
initiated or a valid DESELECT or IDLE command is received. If the new encryption activation request is not validated,
the card will no longer encrypt data during read operations nor will it decrypt data received during write or Check
Password operations.
Checksum
The PICC implements a data validity check function in the form of a checksum. The checksum may function in standard
or cryptographic mode. In the standard mode, the checksum is optional and may be used for transmission error
detection. The cryptographic mode is more powerful since it provides data origin authentication capability in the form of
a Message Authentication Code (MAC). To write data to the device, the host is required to compute a valid MAC and
provide it to the device. If after an ingoing command the device computes a MAC different from the MAC transmitted by
the host, not only is the command abandoned but the cryptographic mode is also reset. A new authentication is
required to reactivate the cryptographic mode.
Initial Device Programming
CryptoRF is delivered with all security features disabled. To program the polling response or enable the security
features of CryptoRF the device must be personalized by programming several registers. This is accomplished by
programming the configuration memory using simple write and read commands. AT88RF04C supports an optional
Secure Personalization mode which encrypts the secrets during programming.
Transport Password
To gain access to the configuration memory, a transport password known as the secure code must be presented using
the Check Password command. The transport password for AT88RF04C is $30 1D D2.
Tuning Capacitance
The capacitance between the coil pins AC1 and AC2 is 82 pF nominal and may vary ±10 pF due to process variation.
AT88RF04C
8672AS–CRRF–04/09