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AT25QL641 데이터시트(PDF) 64 Page - Dialog Semiconductor

부품명 AT25QL641
상세설명  64-Mbit, 1.7V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support
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AT25QL641
DS-25QL641–130E–10/2018
Figure 7-61. Read Security Register instruction (SPI Mode)
Figure 7-62. Read Security Register Instruction (QPI Mode)
7.40
Write Security Register (2Fh)
The ‘Write Security Register’ instruction is for change the state of the bits in the Security Register. Unlike the ‘Write
Status Register’ instruction, the ‘Write Enable’ instruction is not required before executing the ‘Write Security Register’
instruction. The instruction may change the value of bit 1 (LDSO bit) for a customer to lock down the 4 Kbit Secured
OTP area. Once the LDSO bit is set to “1”, the Secured OTP area cannot be updated any more.
The CS must go high exactly at the boundary; otherwise, the instruction is not executed.



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