Atmel AT88SC0104CA [SUMMARY DATASHEET]

5200FS

−CRYPTO−12/11

9

6.

Device Architecture

6.1

User Zones

The EEPROM user memory is divided into four zones of 256 bits each. Multiple zones allow for storage of different types of

data or files in different zones. Access to user zones is permitted only after meeting proper security requirements. These

security requirements are user definable in the configuration memory during device personalization. If the same security

requirements are selected for multiple zones, then these zones may effectively be accessed as one larger zone.

Figure 6-1.

User Zones

Zone

$0

$1

$2

$3

$4

$5

$6

$7

User 0

$00

-

32 bytes

-

$18

User 1

$00

-

32 bytes

-

$18

User 2

$00

-

32 bytes

-

$18

User 3

$00

-

32 bytes

-

$18

7.

Control Logic

Access to the user zones occur 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.