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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT45DB321E датащи(PDF) 35 Page - Renesas Technology Corp |
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AT45DB321E датащи(HTML) 35 Page - Renesas Technology Corp |
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35 / 80 page  DS-AT45DB321E-8784 Rev. N Page 35 9/1/23 © 2023 Renesas Electronics AT45DB321E Datasheet 8.1.2 Freeze Sector Lockdown The Sector Lockdown command can be permanently disabled, and the current sector lockdown state can be permanently frozen so that no additional sectors can be locked down aside from those already locked down. Any attempts to issue the Sector Lockdown command after the Sector Lockdown State has been frozen are ignored. To issue the Freeze Sector Lockdown command, the CS pin must be asserted and the opcode sequence of 34h, 55h, AAh, and 40h must be clocked into the device. Any additional data clocked into the device are ignored. When the CS pin is deasserted, the current sector lockdown state is permanently frozen within a time of tLOCK. Also, the SLE bit in the Status Register is permanently reset to a Logic 0 to indicate that the Sector Lockdown command is permanently disabled. Table 18. Freeze Sector Lockdown Figure 13. Freeze Sector Lockdown Command Byte 1 Byte 2 Byte 3 Byte 4 Freeze Sector Lockdown 34h 55h AAh 40h 34h 55h AAh 40h CS SI Each transition represents eight bits |
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