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ST25DV64K 数据表(PDF) 104 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 104 Page - STMicroelectronics |
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104 / 200 page  Table 153. Write DSFID 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 – 03h: command option is not supported – 0Fh: error with no information given – 12h: the specified block is locked and its contents cannot be changed – 13h: the specified block was not successfully programmed Figure 49. Write DSFID frame exchange between VCD and ST25DVxxx SOF Write DSFID request VCD EOF ST25DVxxx t1 SOF Write DSFID response EOF SOF EOF ST25DVxxx Wt Write sequence when error Write DSFID response 7.6.21 Lock DSFID On receiving the Lock DSFID request, the ST25DVxxx locks the DSFID value permanently. When the Option_flag is set, wait for EOF to respond. The Inventory_flag must be set to 0. During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the ST25DVxxx may not lock correctly the DSFID value in memory. The Wt time is equal to t1nom + N × 302 µs (N is an integer). Table 154. Lock DSFID request format Request SOF Request_flags Lock DSFID UID (1) CRC16 Request EOF - 8 bits 2Ah 64 bits 16 bits - 1. This field is optional. Request parameter: • Request flags • UID (optional) Table 155. Lock DSFID response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 104/200 |
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