AT88SC102 查看數據表（PDF） - Unspecified

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AT88SC102

1K EEPROM– Security Logic with Two Application Zones

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4.1.1

4.1.2

Level 1: Security During Personalization

AT88SC1003 die and modules are delivered with the issuer fuse intact. Issuer personalization 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 “Memory Access Rules During Personalization” (Table 9-1 on page 10).

Conditions:

Issuer fuse = “1” (not blown)

FUS pin = “1” (required)

Level 2: Security After Personalization

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

alization, 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 applica-

tion development without permanently blowing the issuer fuse.

See “Memory Access Rules After Personalization” (Table 10-1 on page 11).

Conditions:

Issuer fuse = “0” (blown)

FUS pin = “X”

or

Issuer fuse = “1” (not blown)

FUS pin = “0”

4 AT88SC102

1419C–SMEM–6/08

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