AT88SC0404C-MJ(2009) Просмотр технического описания (PDF) - Atmel Corporation
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AT88SC0404C-MJ Datasheet PDF : 20 Pages
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5. Device Architecture
5.1.
User Zones
The EEPROM user memory is divided into 4 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 configuration
memory. If the same security requirements are selected for multiple zones, then these zones may effectively be
accessed as one larger zone.
Figure 8. User Zones
Zone
$00
User 0
─
─
$78
$00
User 1
─
─
$78
$00
User 2
─
─
$78
$00
User 3
─
─
$78
$0
$1
$2
$3
$4
$5
$6
$7
128 Bytes
128 Bytes
128 Bytes
128 Bytes
6. 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.
8 AT88SC0404C
2023KS–SMEM–10/09
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