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AT25SF321 bảng dữ liệu(PDF) 22 Page - Dialog Semiconductor

tên linh kiện AT25SF321
Giải thích chi tiết về linh kiện  32-Mbit, 2.5V Minimum SPI Serial Flash Memory with Dual-I/O and Quad-IO Support
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AT25SF321
DS-25SF321–047F–8/2017
8.3
Non-Volatile Protection
The device can be software protected against erroneous or malicious program or erase operations by utilizing the Non-
Volatile Protection feature of the device. Non-Volatile Protection can be enabled or disabled by using the Write Status
Register command to change the value of the Protection (CMP, SEC, TB, BP2, BP1, BP0) bits in the Status Register.
The following table outlines the states of the Protection bits and the associated protection area
.
Table 8-1.
Memory Array with CMP=0
Protection Bits
Memory Content
SEC
TB
BP2
BP1
BP0
Address Range
Portion
X
X
0
0
0
None
None
0
0
0
0
1
3F0000h-3FFFFFh
Upper 1/64
0
0
0
1
0
3E0000h-3FFFFFh
Upper 1/32
0
0
0
1
1
3C0000h-3FFFFFh
Upper 1/16
0
0
1
0
0
380000h-3FFFFFh
Upper 1/8
0
0
1
0
1
300000h-3FFFFFh
Upper 1/4
0
0
1
1
0
200000h-3FFFFFh
Upper 1/2
0
1
0
0
1
000000h-00FFFFh
Lower 1/64
0
1
0
1
0
000000h-01FFFFh
Lower 1/32
0
1
0
1
1
000000h-03FFFFh
Lower 1/16
0
1
1
0
0
000000h-07FFFFh
Lower 1/8
0
1
1
0
1
000000h-0FFFFFh
Lower 1/4
0
1
1
1
0
000000h-1FFFFFh
Lower 1/2
X
X
1
1
1
000000h-3FFFFFh
ALL
1
0
0
0
1
3FF000h-3FFFFFh
Upper 1/512
1
0
0
1
0
3FE000h-3FFFFFh
Upper 1/256
1
0
0
1
1
3FC000h-3FFFFFh
Upper 1/128
1
0
1
0
X
3F8000h-3FFFFFh
Upper 1/64
1
0
1
1
0
3F8000h-3FFFFFh
Upper 1/64
1
1
0
0
1
000000h-000FFFh
Lower 1/512
1
1
0
1
0
000000h-001FFFh
Lower 1/256
1
1
0
1
1
000000h-003FFFh
Lower 1/128
1
1
1
0
X
000000h-007FFFh
Lower 1/64
1
1
1
1
0
000000h-007FFFh
Lower 1/64



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