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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) 133 Page - STMicroelectronics |
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ST25DV64K Scheda tecnica(HTML) 133 Page - STMicroelectronics |
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133 / 220 page  DocID027603 Rev 4 133/220 ST25DV04K ST25DV16K ST25DV64K RF operations 219 Response parameter: • Error code as Error_flag is set – 03h: command option is not supported – 0Fh: error with no information given – 12h: the specified block is locked and its contents cannot be changed – 13h: the specified block was not successfully programmed 7.6.21 Lock DSFID On receiving the Lock DSFID request, the ST25DVxxx locks the DSFID 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 DSFID value in memory. The Wt time is equal to t1nom + N × 302 µs (N is an integer). Request parameter: • Request flags • UID (optional) Table 116. Write DSFID response format when Error_flag is set Response SOF Response_flags Error code CRC16 Response EOF - 8 bits 8 bits 16 bits - Figure 49. Write DSFID frame exchange between VCD and ST25DVxxx VCD SOF Write DSFID request EO F ST25DVxxx <-t1-> SO F Write DSFID response EO F Write sequence when error ST25DVxxx <---------------- Wt ----------> SO F Write DSFID response EOF Table 117. Lock DSFID request format Request SOF Request_flags Lock DSFID UID(1) 1. Gray color means that the field is optional. CRC16 Request EOF -8 bits 2Ah 64 bits 16 bits - |
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