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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST25DV64K 数据表(PDF) 102 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 102 Page - STMicroelectronics |
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102 / 200 page  Figure 47. Write AFI frame exchange between VCD and ST25DVxxx SOF Write AFI request VCD EOF ST25DVxxx t1 SOF Write AFI response EOF SOF EOF ST25DVxxx Wt Write sequence when error Write AFI response 7.6.19 Lock AFI On receiving the Lock AFI request, the ST25DVxxx locks the AFI 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 AFI value in memory. The Wt time is equal to t1nom + N × 302 µs (N is an integer). Table 148. Lock AFI request format Request SOF Request_flags Lock AFI UID (1) CRC16 Request EOF - 8 bits 28h 64 bits 16 bits - 1. This field is optional. Request parameter: • Request Flags • UID (optional) Table 149. Lock AFI response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - Response parameter: • No parameter Table 150. Lock AFI response format when Error_flag is set Response SOF Response_flags Error code CRC16 Response EOF - 8 bits 8 bits 16 bits - Response parameter: ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 102/200 |
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