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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST25TA02K датащи(PDF) 13 Page - STMicroelectronics |
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ST25TA02K датащи(HTML) 13 Page - STMicroelectronics |
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13 / 50 page  DocID027801 Rev 1 13/50 ST25TA02K ST25TA02K memory management 3.1.4 System file layout The system file specifies the configuration of the ST25TA02K. Table 6 lists the different fields. 3.2 Read and write access rights to the NDEF File The NDEF file can be locked for read or write accesses. It is also protected by a 128-bit password that the host shall present before accessing the NDEF file. There are two 128-bit passwords, one for the read access and the other one for the write access. Table 6. Field list File offset Field name Number of bytes Read access Write access Delivery state 0x0000 Length system file 2 yes - 0x0012 0x0002 ST reserved 1 yes none 0x80 0x0003 Event Counter Config 1 yes yes(1) 1. Configuration bytes can be locked by setting the Most significant bit to 1. Once locked, these bytes cannot be changed anymore. 0x00 0x0004 20 bits counter (MS nibble 0x0) 3 yes none 0x000000 0x0007 Product version 1 yes none 0x13(2) 2. ST reserved. 0x0008 UID 7 yes none 0x02E2 xx xx xx xx xx (3) 3. x values are defined by ST to ensure UID unicity. 0x000F Memory Size - 1 2 yes none 0x00FF 0x0011 Product Code 1 yes none 0xE2 Table 7. Details about the Counter config field File offset b7 b6-b2 b1 b0 0x0003 Counter config lock bit: 0b0: unlocked 0b1: locked 0b00000: ST reserved Counter enable: 0b0: disable 0b1: enable Counter increment: 0b0: on Read 0b1: on Write |
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