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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) 165 Page - STMicroelectronics |
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ST25DV64K Scheda tecnica(HTML) 165 Page - STMicroelectronics |
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165 / 220 page  DocID027603 Rev 4 165/220 ST25DV04K ST25DV16K ST25DV64K RF operations 219 Response parameter: • Error code as Error_flag is set: – 02h: command not recognized – 03h: command option not supported – 0Fh: error with no information given 7.6.42 Fast Read Message Length On receiving the Fast Read Message Length command, the ST25DV reads the MB_LEN_dyn register which contains the mailbox message length and sends back its 8-bit value in the response. The Option_flag is not supported. The Inventory_flag must be set to 0. The subcarrier_flag should be set to 0, otherwise the ST25DVxxx answers with an error code. The data rate of the response is multiplied by 2 compared to Read Message Length command. Request parameters: • Request flag • UID (optional) Figure 70. Fast Write Message frame exchange between VCD and ST25DVxxx VCD SOF Fast Write Message request EOF ST25DVxxx <-t1-> SOF Fast Write Message rresponse0 EOF Write sequence when error ST25DVxxx <------------------- t1 ---------------> SOF Fast Write Message r response EOF Table 193. Fast Read Message Length request format Request SOF Request_flags Fast Read Message Length IC Mfg code UID(1) 1. Gray color means that the field is optional. CRC16 Request EOF - 8 bits CBh 02h 64 bits 16 bits - |
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