AT88SC0104CRF Просмотр технического описания (PDF) - Atmel Corporation
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AT88SC0104CRF Datasheet PDF : 9 Pages
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User Memory
Configuration
Memory
Security Fuses
The EEPROM user memory is divided into four user zones as shown in the memory
map in Table 1. 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 in the configuration
memory during personalization of the device. The EEPROM memory page length is 16
bytes.
Table 1. Memory Map
Zone
$00
–
User 0
–
$18
$00
–
User 1
–
$18
$00
–
User 2
–
$18
$00
–
User 3
–
$18
$0
$1
$2
$3
$4
$5
$6
$7
32 Bytes
32 Bytes
32 Bytes
32 Bytes
The configuration memory consists of 2048 bits of EEPROM memory used for storing
system data, passwords, keys, codes, and security-level definitions for each user zone.
Access rights to the configuration zone are defined in the control logic and may not be
altered by the user. These access rights include the ability to program certain portions of
the configuration memory and then lock the data written through use of the security
fuses.
There are three fuses on the device that must be blown during the device personaliza-
tion process. Each fuse locks certain portions of the configuration memory as OTP
memory. Fuses are designated for the module manufacturer, card manufacturer and
card issuer and must be blown in sequence.
4 AT88SC0104CRF
5021CS–CRRF–12/06
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