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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) 156 Page - STMicroelectronics |
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ST25DV64K Scheda tecnica(HTML) 156 Page - STMicroelectronics |
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156 / 220 page  RF operations ST25DV04K ST25DV16K ST25DV64K 156/220 DocID027603 Rev 4 7.6.36 Present Password On receiving the Present Password command, the ST25DVxxx compares the requested password with the data contained in the request and reports if the operation has been successful in the response. Refer to Section 5.6: Data Protection for details on password Management. After a successful command, the security session associate to the password is open as described in Section 5.6: Data Protection. The Option_flag is not supported, and the Inventory_flag must be set to 0. Request parameter: • Request flags • UID (optional) • Password Number (00h = Password configuration, 0x01 = Pswd1, 0x02 = Pswd2, 0x03 = Pswd3, other = Error) • Password Response parameter: • No parameter. The response is sent back after the write cycle. Figure 64. Write Password frame exchange between VCD and ST25DVxxx VCD SOF Write Password request EOF ST25DVxxx <-t1-> SOF Write Password response EOF Write sequence when error ST25DVxxx <---------------- Wt -------------> SOF Write Password response EOF Table 171. Present Password request format Request SOF Request _flags Present Password IC Mfg code UID(1) 1. Gray color means that the field is optional. Password number Password CRC16 Request EOF -8 bits B3h 02h 64 bits 8 bits 64 bits 16 bits - Table 172. Present Password response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - |
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