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M24LR16E-R 数据表(PDF) 102 Page - STMicroelectronics |
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M24LR16E-R 数据表(HTML) 102 Page - STMicroelectronics |
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102 / 143 page  Command codes M24LR16E-R 102/143 Doc ID 018932 Rev 8 Response parameter: ● Error code as Error_flag is set: – 03h: the option is not supported – 10h: the specified block is not available When configured in the RF busy mode, the RF WIP/BUSY pin is tied to 0 from the SOF that starts the Get Multiple Block Security Status command to the end of the M24LR16E-R response. When configured in the RF write in progress mode, the RF WIP/BUSY pin remains in high-Z state. 26.14 Write-sector Password On receiving the Write-sector Password command, the M24LR16E-R uses the data contained in the request to write the password and reports whether the operation was successful in the response. The Option_flag is supported. During the RF write cycle time, Wt, there must be no modulation at all (neither 100% nor 10%), otherwise, the M24LR16E-R may not correctly program the data into the memory. The Wt time is equal to t1nom + 18 × 302 µs. After a successful write, the new value of the selected password is automatically activated. It is not required to present the new password value until M24LR16E-R power-down. Table 76. Get Multiple Block Security Status response format when Error_flag is set Response SOF Response_ flags Error code CRC16 Response EOF 8 bits 8 bits 16 bits Figure 66. Get Multiple Block Security Status frame exchange between VCD and M24LR16E-R VCD SOF Get Multiple Block Security Status EOF M24LR16E-R <-t1-> SOF Get Multiple Block Security Status EOF Table 77. Write-sector Password request format Request SOF Request _flags Write- sector password IC Mfg code UID(1) 1. Gray means that the field is optional. Password number Data CRC16 Request EOF 8 bits B1h 02h 64 bits 8 bits 32 bits 16 bits |
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