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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) 131 Page - STMicroelectronics |
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ST25DV64K Scheda tecnica(HTML) 131 Page - STMicroelectronics |
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131 / 220 page  DocID027603 Rev 4 131/220 ST25DV04K ST25DV16K ST25DV64K RF operations 219 7.6.19 Lock AFI On receiving the Lock AFI request, the ST25DVxxx locks the AFI value permanently. 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 AFI value in memory. The Wt time is equal to t1nom + N × 302 µs (N is an integer). Request parameter: • Request Flags • UID (optional) Response parameter: • No parameter Response parameter: • Error code as Error_flag is set – 03h: command option is not supported – 0Fh: error with no information given – 11h: the specified block is already locked and thus cannot be locked again – 14h: the specified block was not successfully locked Table 111. Lock AFI request format Request SOF Request_flagsLock AFI UID(1) 1. Gray color means that the field is optional. CRC16 Request EOF - 8 bits 28h 64 bits 16 bits - Table 112. Lock AFI response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - Table 113. Lock AFI 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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