AT88SC0104C datasheet(12/58 Pages) ATMEL

12 / 58 page

5210B–SMIC–11/08

AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C

memory during device personalization. This logic also implements the cryptographic engine for

performing the various higher-level security functions of the device.

4.2

Configuration Memory

The configuration memory consists of 2048 bits of EEPROM memory used for storing pass-

words, keys, codes and defining security levels to be used for each User Zone. The control logic

defines access rights to the configuration memory as well as to the user zones 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 the use of Security Fuses. The

configuration memory for each CryptoMemory device is identical with the exception of the num-

ber of Access Registers and Password/Key Registers available. Devices with 4 user zones

have four sets of registers, those with 8 user zones 8 sets of registers, and those with 16 user

zones 16 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.

AT88SC0104C Datasheet(PDF) 12 Page - ATMEL Corporation