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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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ST25DV64KC Scheda tecnica(PDF) 61 Page - STMicroelectronics |
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ST25DV64KC Scheda tecnica(HTML) 61 Page - STMicroelectronics |
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61 / 203 page  Figure 29. I2C security sessions management VCC OFF VCC ON VCC OFF I2C security session closed I2C_SSO=00h I2C security session opened I2C_SSO=01h Present I2C_PWD not OK Any other command Present I2C_PWD OK Any other command 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 0007h) can be independently write locked. User memory protection from RF access In RF mode, each memory area of the ST25DVxxKC 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 45. RFA1SS, Table 47. RFA2SS, Table 49. RFA3SS, and Table 51. RFA4SS for details about available read and write protections). Note: Setting 00b in PWD_CTRL_Ai field means that RF user security session cannot be open by any password for the corresponding area. When updating RFAiSS registers, the new protection value is effective immediately after the register write completion. ST25DV04KC ST25DV16KC ST25DV64KC Data protection DS13519 - Rev 3 page 61/203 |
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