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ST25DV64K 数据表(PDF) 134 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 134 Page - STMicroelectronics |
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134 / 200 page  Table 233. Fast Read Message Length response format when Error_flag is NOT set Response SOF Response_flags Data CRC16 Response EOF - 8 bits 8 bits 16 bits - Response parameters: • One byte of data: volatile Control register. Table 234. Fast Read Message Length 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 option not recognized – 03h: command not supported – 0Fh: error with no information given Figure 71. Fast Read Message Length frame exchange between VCD and ST25DVxxx SOF Fast Read Message Length request VCD ST25DVxxx EOF SOF Fast Read Message Length response EOF t1 7.6.43 Fast Read Dynamic configuration On receiving the Fast Read Dynamic configuration command, the ST25DVxxx reads the Dynamic register address by the pointer 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 Dynamic configuration command. Table 235. Fast Read Dynamic configuration request format Request SOF Request_flags Fast Read Dynamic configuration IC Mfg code UID (1) Pointer address CRC16 Request EOF - 8 bits CDh 02h 64 bits 8 bits 16 bits - 1. This field is optional. Request parameters: • Request flag • UID (optional) ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 134/200 |
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