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ST25DV64K Scheda tecnica(PDF) 151 Page - STMicroelectronics |
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ST25DV64K Scheda tecnica(HTML) 151 Page - STMicroelectronics |
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151 / 220 page ![]() DocID027603 Rev 4 151/220 ST25DV04K ST25DV16K ST25DV64K RF operations 219 Response parameter: • No parameter. The response is sent back after the write cycle. Response parameter: • Error code as Error_flag is set: – 02h: command not recognized – 03h: command option not supported – 0Fh: error with no information given 7.6.32 Read Message Length On receiving the Read Message Length command, the ST25DVxxx 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. Request parameters: • UID (optional) Table 162. Write Message response format when Error_flag is set Response SOF Response_flags Error code CRC16 Response EOF - 8 bits 8 bits 16 bits - Figure 60. Write Message frame exchange between VCD and ST25DVxxx VCD SOF Write Message request EOF ST25DVxxx <-t1-> SOF Write Message response EOF Write sequence when error ST25DVxxx <------------------- t1 ---------------> SOF Write Message response EOF Table 163. Read Message Length request format Request SOF Request_flags Read Message Length IC Mfg code UID(1) 1. Gray color means that the field is optional. CRC16 Request EOF - 8 bits ABh 02h 64 bits 16 bits - |
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