AT88SC0404CA-PU Atmel, AT88SC0404CA-PU Datasheet - Page 8

• Manufacturer Part Number: AT88SC0404CA-PU
• Description: IC EEPROM 4KBIT 4MHZ 8DIP
• Manufacturer: Atmel
• Series: CryptoMemory®r

Specifications of AT88SC0404CA-PU

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 4K (512 x 8)
• Speed: 4MHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• For Use With: AT88SC-SDK1 - KIT TUEMA DK CRYPTOMEM SMARTCARDAT88SC-DK1 - KIT DEV FOR AT88SCXXXXC FAMILY
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.
5.1.
5.2.
5.3.
8664C–CRYPT–01/10
Configuration and User Zone Description
Detailed Description
To enable the security features of Atmel
appropriate passwords and keys. This is accomplished though programming the configuration zone of CryptoMemory
using simple write and read commands. To gain access to the configuration zone, the secure code (write 7 password)
must be successfully presented. After writing and verifying data in the configuration zone, the security fuses must be
blown to lock this information in the device. For additional information on personalizing CryptoMemory,
examples in the protocol sections of this specification.
Control Logic
Access to the user zones occurs only through the control logic built into the device. This logic is configurable through
access registers, key registers and keys programmed into the configuration memory during device personalization.
Also implemented in the control logic is a cryptographic engine for performing the various higher-level security functions
of the device.
Configuration Memory
The configuration memory consists of 2048-bits of EEPROM memory used for storing passwords, keys, codes and
defining security levels to be used for each User Zone. The control logic defines access rights to the configuration
memory and the user may not alter these rights. The access rights include the ability to program certain portions of the
configuration memory and then lock the data written through use of Security Fuses. The configuration memory for each
CryptoMemory device is identical with the exception of the number of Access Registers and Password/Key Registers
available. Devices with four user zones have four sets of registers, and those with eight user zones eight sets of
registers. Unused memory space in the register region becomes reserved to ensure other components of the
configuration memory remain at the same address location regardless of the number of user zones in a device.
®
CryptoMemory
Atmel AT88SC0104/0204/0404/0808/CA
®
, personalize the device by setting up registers and loading
please see the
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