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AT88SC0808C-SI Datasheet(PDF) 8 Page - ATMEL Corporation |
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AT88SC0808C-SI Datasheet(HTML) 8 Page - ATMEL Corporation |
8 / 14 page 8 AT88SC0808C 2024DS–SMEM–04/03 Encryption The data exchanged between the device and the host during read, write and verify password commands may be encrypted to ensure data confidentiality. The issuer may choose to require encryption for a user zone by settings made in the configuration zone. Any one of four keys may be selected for use with a user zone. In this case, activation of the encryption mode is required in order to read/write data in the zone and only encrypted data will be transmitted. Even if not required, the host may elect to activate encryption provided the proper keys are known. Supervisor Mode Enabling this feature allows the holder of one specific password to gain full access to all eight password sets, including the ability to change passwords. Modify Forbidden No write access is allowed in a user zone protected with this feature at any time. The user zone must be written during device personalization prior to blowing the security fuses. Program Only For a user zone protected by this feature, data within the zone may be changed from a “1” to a “0”, but never from a “0” to a “1”. |
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