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AT25SL641 데이터시트(PDF) 62 Page - Dialog Semiconductor

부품명 AT25SL641
상세설명  64-Mbit, 1.7V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support
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AT25SL641
DS-25SL641–113F–12/2018
Figure 7-58. Read Security Register Instruction (SPI Mode)
Figure 7-59. Read Security Register Instruction (QPI Mode)
7.39
Write Security Register (2Fh)
The Write Security Register instruction is for changing the values of Security Register bits. Unlike the Write Status
Register, the Write Enable instruction is not required before executing the Write Security Register instruction. The Write
Security Register instruction may change the value of bit 1 (LDSO) for customer to lock-down the 4 Kbit Secured OTP
area. Once the LDSO bit is set, the Secured OTP area can no longer be updated.
The CS must go high exactly at the boundary; otherwise, the instruction is rejected and not executed.



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