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AT25QL641 bảng dữ liệu(PDF) 65 Page - Dialog Semiconductor

tên linh kiện AT25QL641
Giải thích chi tiết về linh kiện  64-Mbit, 1.7V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support
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AT25QL641 bảng dữ liệu(HTML) 65 Page - Dialog Semiconductor

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AT25QL641
DS-25QL641–130E–10/2018
Figure 7-63. Write Security Register Instruction for SPI Mode (left) and QPI Mode (right)
7.41
4 Kbit Secured OTP
The AT25QL641 provides a 4 Kbit one-time-program area for setting a unique serial number which can be set by
either the factory or the customer. Security register bit 0 indicates whether the chip is locked by factory or not.
The 4 Kbit OTP space is accessed using the B1h instruction as described above. After the OTP value has been
programmed, the C1h instruction is used to exit from the secured OTP space.
The secure OTP space is divided into a 128-bit electronic serial number, and 3968 bits is user-defined data as shown in
Table 7-13.
Note. Once the OTP space is locked down, either by the factory or the customer, it cannot be changed any more.
While in 4 Kbit secured OTP mode, array access is not allowed to write.
Table 7-13. Secure OTP Address Space
Address Range
Size
Standard
Customer Lock
000000 ~ 00000F
128-bit
ESN
(Electrical Serial Number)
Determined by customer
000010 ~ 0001FF
3968-bit
N/A



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