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ST25DV64K 数据表(PDF) 115 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 115 Page - STMicroelectronics |
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115 / 200 page  7.6.27 Write Configuration The Write Configuration command is used to write static system configuration register. The Write Configuration must be preceded by a valid presentation of the RF configuration password (00) to open the RF configuration security session. On receiving the Write Configuration command, the ST25DVxxx writes the data contained in the request to the system configuration register at the Pointer address and reports whether the write operation was successful in the response or not. When the Option_flag is set, wait for EOF to respond. The Inventory_flag is not supported. During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the ST25DVxxx may not program correctly the data into the Configuration byte. The Wt time is equal to t1nom + N × 302 µs (N is an integer). Table 184. Write Configuration request format Request SOF Request_flags Write Configuration IC Mfg code UID (1) Pointer Register value(2) CRC16 Request EOF - 8 bits A1h 02h 64 bits 8 bits 8 bits 16 bits - 1. This field is optional. 2. Before updating the register value, check the meaning of each bit in previous sections. Request parameters: • Request flags • Register pointer • Register value • UID (optional) Table 185. Write Configuration response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - Note: Please refer to Table 11. System configuration memory map for details on register addresses. Response parameter: • No parameter. The response is sent back after the writing cycle. Table 186. Write configuration 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 is not supported – 0Fh: error with no information given – 10h: block not available – 12h: block already locked, content can't change – 13h: the specified block was not successfully programmed ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 115/200 |
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