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ST25DV64K 数据表(PDF) 48 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 48 Page - STMicroelectronics |
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48 / 200 page  5.6 Data Protection ST25DVxxx provides a special data protection mechanism based on passwords that unlock security sessions. User memory can be protected for read and/or write access and system configuration can be protected from write access, both from RF and I2C assess. 5.6.1 Data protection registers Table 43. RFA1SS access RF I2C Command Type Address Type Read Configuration (cmd code A0h) @04h Write Configuration (cmd code A1h) @04h R always, W if RF configuration security session is open and configuration not locked E2 = 1, 0004h R always, W if I2C security session is open Table 44. RFA1SS Bit Name Function Factory Value b1-b0 PWD_CTRL_A1 00: Area 1 RF user security session can’t be open by password 01: Area 1 RF user security session is open by RF_PWD_1 10: Area 1 RF user security session is open by RF_PWD_2 11: Area 1 RF user security session is open by RF_PWD_3 00b b3-b2 RW_PROTECTION_A1 00: Area 1 RF access: Read always allowed / Write always allowed 01: Area 1 RF access: Read always allowed, Write allowed if RF user security session is open 10: Area 1 RF access: Read always allowed, Write allowed if RF user security session is open 11: Area 1 RF access: Read always allowed, Write always forbidden 00b b7-b4 RFU - 0000b Note: Refer to Table 11. System configuration memory map for the RFA1SS register. Table 45. RFA2SS access RF I2C Command Type Address Type Read Configuration (cmd code A0h) @06h Write Configuration (cmd code A1h) @06h R always, W if RF configuration security session is open and configuration not locked E2 = 1, 0006h R always, W if I2C security session is open ST25DV04K ST25DV16K ST25DV64K Data Protection DS10925 - Rev 9 page 48/200 |
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