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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) 78 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 78 Page - STMicroelectronics |
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78 / 220 page  ST25DVxxx specific features ST25DV04K ST25DV16K ST25DV64K 78/220 DocID027603 Rev 4 There is no interaction between I2C and RF security sessions. Both are independent and can run in parallel. Figure 23. I2C security sessions management 5.6.3 User memory protection On factory delivery, areas are not protected. Each area can be individually protected in read and/or write access from RF and I2C. Area 1 is always readable (from RF and I2C). Furthermore, RF blocks 0 and 1 (I2C bytes 0000h to 00007h) can be independently write locked. User memory protection from RF access In RF mode, each memory area of the ST25DVxxx can be individually protected by one out of three available passwords (RF password 1, 2 or 3), and each area can also have individual Read/Write access conditions. For each area, an RFAiSS register is used to: • Select the RF password that unlock the RF user security session for this area • Select the protection against read and write operations for this area (See Table 28: RFA1SS, Table 29: RFA2SS, Table 30: RFA3SS and Table 31: RFA4SS for details about available read and write protections). |
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