AT88SC1003-09PT-00 데이터 시트보기 (PDF) - Atmel Corporation

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AT88SC1003-09PT-00

1K EEPROM–Security Logic with Three Application Zones

Atmel Corporation 

AT88SC1003

Security Features

Security Levels

Level 1: Security During

Personalization by the Card

Issuer

Level 2: Security After

Personalization

(Customer Release)

The security features of Atmel’s AT88SC1003 include:

– Data access only after validation of the security code

– Permanent invalidation of device upon four consecutive false security code

presentations

– Read/write protection of certain memory zones

– Secure transport of devices using security code compare sequence.

Access to the memory is controlled by the state of the issuer fuse and by the voltage

supply applied on the FUS pin.

FUS Pin

Logic “0”

Logic “1”

Logic “1”

Issuer Fuse

X

1

0

Security Level

2

1

2

AT88SC1003 die and modules are delivered with the issuer fuse intact. Issuer personal-

ization is completed at this level. Security code validation is required to allow access to

personalize the EEPROM memory. During personalization, the manufacturer fuse may

be blown to lock the manufacturer’s zone.

See “Access Conditions During Personalization” (Table 6 on page 12).

Conditions:

Issuer fuse = “1” (not blown)

FUS pin = “1” (required)

EEPROM memory zones are protected by the various flags and passwords. After issuer

personalization, Security Level 2 is implemented by blowing the issuer fuse. The device

can also be placed in Security Level 2 by taking the FUS pin low, independent of the

state of the issuer fuse. This function of the FUS pin enables the card issuer to simulate

Security Level 2 during application development, without permanently blowing the

issuer fuse.

See “Access Conditions After Personalization” (Table 7 on page 13).

Conditions:

Issuer fuse = “0” (blown)

FUS pin = “X”

or

Issuer fuse = “1” (not blown)

FUS pin = “0”

3

2035B–SMEM–08/03

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