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ST25DV04K Datasheet(PDF) 120 Page - STMicroelectronics |
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ST25DV04K Datasheet(HTML) 120 Page - STMicroelectronics |
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120 / 200 page  Table 198. Write Message response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - Response parameter: • No parameter. The response is sent back after the write cycle. Table 199. Write Message response format when Error_flag is set Response SOF Response_flags Error code CRC16 Response EOF - 8 bits 8 bits 16 bits - Response parameter: • Error code as Error_flag is set: – 02h: command not recognized – 03h: command option not supported – 0Fh: error with no information given Figure 60. Write Message frame exchange between VCD and ST25DVxxx SOF Write Message request VCD EOF ST25DVxxx t1 SOF Write Message response EOF SOF EOF ST25DVxxx t1 Write sequence when error Write Message response 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 value of MB_LEN_Dyn returned is the (size of the message length in Bytes - 1). The Option_flag is not supported. The Inventory_flag must be set to 0. Table 200. Read Message Length request format Request SOF Request_flags Read Message Length IC Mfg code UID (1) CRC16 Request EOF - 8 bits ABh 02h 64 bits 16 bits - 1. The field is optional. Request parameters: • UID (Optional) ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 120/200 |
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