8

AT88SC1616C

2030IS–SMIC–04/07

Device Architecture

User Zones

The EEPROM user memory is divided into 16 zones of 1024 bits each. Multiple zones

allow for different types of data or files to be stored in different zones. Access to the user

zones is allowed only after security requirements have been met. These security

requirements are defined by the user during the personalization of the device in the con-

figuration memory. If the same security requirements are selected for multiple zones,

then these zones may effectively be accessed as one larger zone.

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 con-

trol 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 and codes and for defining security levels to be used for each user

zone. Access rights to the configuration memory are defined in the control logic and may

not be altered by the user.

Figure 8. User Zone

ZONE

$0

$1

$2

$3

$4

$5

$6

$7

User 0

$00

-

128 Bytes

-

$78

User 1

$00

--

-

--

User 14

$78

User 15

$00

-

128 Bytes

-

$78