AT88SC0808CRF 데이터 시트보기 (PDF) - Atmel Corporation
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AT88SC0808CRF Datasheet PDF : 9 Pages
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User Memory
Configuration
Memory
Security Fuses
AT88SC0808CRF
The EEPROM user memory is divided into eight 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
zone during personalization of the device. If the same security requirements are
selected for multiple zones, then these zones may be effectively accessed as one larger
zone. The EEPROM memory page length is 16 bytes.
Table 1. Memory Map
Zone
$0
$1
$2
$3
$4
$5
$6
$7
$00
128 Bytes
–
User 0
–
$78
$00
User 1
–
–
–
–
–
User 6
$78
$00
128 Bytes
–
User 7
–
$78
The configuration zone 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 zone 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 zone as OTP
memory. Fuses are designed for the module manufacturer, card manufacturer and card
issuer and should be blown in sequence, although all programming of the device and
blowing of the fuses may be performed at one final step.
5
5027AS–CRRF–05/03
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