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MFPROT_LP データシート(PDF) 30 Page - rfsolutions.ltd |
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MFPROT_LP データシート(HTML) 30 Page - rfsolutions.ltd |
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30 / 35 page  ib technology 30 Access Bits Access condition for: Application C1 C2 C3 Read Write Increment Decrement, Transfer, Restore 0 0 0 keyA|B keyA|B keyA|B keyA|B (Transport setting) 0 0 1 keyA|B never never keyA|B (value block) 0 1 0 keyA|B never never never (read/write block) 0 1 1 keyB keyB never never (read/write block) 1 0 0 keyA|B keyB never never (read/write block) 1 0 1 keyB never never never (read/write block) 1 1 0 keyA|B keyB keyB keyA|B (value block) 1 1 1 never never never never (read/write block) Combining the transport (default) access conditions for the data areas and the sector trailer block, the typical setting is: Sector Trailer Block Byte: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0xA0 A1 A2 A3 A4 A5 FF 07 80 69 B0 B1 B2 B3 B4 B5 The default access bits (0xFF 07 80 69) define that KeyA must used for all operations and KeyA can never be read, so in the previous example bytes 0 – 5 (keyA) would always read as zeros. KeyA (6 bytes) Access Bits KeyB (6 bytes) |
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