at88rf04c ATMEL Corporation, at88rf04c Datasheet - Page 4

• Manufacturer Part Number: at88rf04c
• Description: 13.56 Mhz Cryptorf Eeprom Memory 4 Kbits
• Manufacturer: ATMEL Corporation

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Configuration Memory
The configuration memory consists of 2048 bits of EEPROM memory used for storing system data, passwords, keys,
codes, and security-level definitions for each user zone. Access rights to the configuration zone are defined in the
control logic and may not be altered by the user. These access rights include the ability to program certain portions of
the configuration memory and then lock the data written through use of the security fuses.
Security Fuses
There are three fuses on the device that must be blown during the device personalization process. Each fuse locks
certain portions of the configuration memory as OTP memory. Fuses are designated for locking the secrets and the
User Zone access requirements. The fuses must be blown in sequence.
Communication Security
Communication between the PICC and reader operates in three basic modes. Standard Communication Security mode
is the default mode for the device after power-up and anticollision. Authentication Communication Security mode is
activated by a successful authentication sequence. Encryption Communication Security mode is activated by a
successful encryption activation sequence, following a successful authentication.
Table 2.
Note:
AT88RF04C
Normal
Authentication
Encryption
Communication Mode
1. AT88RF04C supports an encryption option for programming secrets.
Configuration Security Modes
Encryption
User Data
Clear
Clear
System Data
Clear
Clear
Clear
(1)
Passwords
Encryption
Encryption
Clear
8672AS–CRRF–04/09