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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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ST25DV64K Scheda tecnica(PDF) 120 Page - STMicroelectronics |
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ST25DV64K Scheda tecnica(HTML) 120 Page - STMicroelectronics |
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120 / 220 page  RF operations ST25DV04K ST25DV16K ST25DV64K 120/220 DocID027603 Rev 4 7.6.11 Extended Lock block On receiving the extended Lock block request, the ST25DVxxx locks the single block value permanently and protects its content against new writing. This command is only applicable for the blocks 0 and 1 which may include a CC file. For a global protection of a area, update accordingly the AiSS bits in the system area. When the Option_flag is set, wait for EOF to respond. The Inventory_flag must be set to 0. During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the ST25DVxxx may not lock correctly the single block value in memory. The Wt time is equal to t1nom + N × 302 µs (N is an integer). Request parameter: • Request Flags • UID (optional) • Block number (only value 00h or 01h) are allowed to protect the CCfile in case of NDEF usage. Response parameter: • No parameter Response parameter: • Error code as Error_flag is set – 03h: command option not supported – 10h: block not available – 11h: the specified block is already locked and thus cannot be locked again – 14h: the specified block was not successfully locked Table 85. Extended Lock block request format Request SOF Request_flags Extended Lock block UID(1) 1. Gray color means that the field is optional. block number CRC16 Request EOF - 8 bits 32h 64 bits 16 bits 16 bits - Table 86. Extended Lock block response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - Table 87. Extended Lock block response format when Error_flag is set Response SOF Response_flags Error code CRC16 Response EOF - 8 bits 8 bits 16 bits - |
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