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AT25SL1281C Datasheet(PDF) 21 Page - Renesas Technology Corp

Part # AT25SL1281C
Description  128-Mbit, 1.65 V – 1.95 V SPI Serial Flash Memory with Dual I/O, Quad I/O, and QPI Support
PDF  90 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

AT25SL1281C Datasheet(HTML) 21 Page - Renesas Technology Corp

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DS-AT25SL/QL1281C-202 Rev. C
Page 21
Dec 9, 2025
© 2025 Renesas Electronics
AT25SL1281C / AT25QL1281C Datasheet
8.
Array Memory Protection
Table 8 and Table 9 detail the protection scheme for the Status Register Memory.
1. X = Don’t care.
Table 8. Status Register Memory Protection (CMP = 0)
Status Register Bits
Memory Protection
BP4
BP3
BP2
BP1
BP0
Addresses
Density
Portion
X
X
0
0
0
NONE
NONE
NONE
00
0
0
1
FC0000h - FFFFFFh
256 kB
Upper 1/64
00
0
1
0
F80000h - FFFFFFh
512 kB
Upper 1/32
0
0
0
1
1
F00000h - FFFFFFh
1 MB
Upper 1/16
0
0
1
0
0
E00000h - FFFFFFh
2MB
Upper 1/8
0
0
1
0
1
C00000h - FFFFFFh
4 MB
Upper 1/4
0
0
1
1
0
800000h - FFFFFFh
8 MB
Upper 1/2
0
1
0
0
1
000000h - 03FFFFh
256 kB
Lower 1/64
0
1
0
1
0
000000h - 07FFFFh
512 kB
Lower 1/32
0
1
0
1
1
000000h - 0FFFFFh
1 MB
Lower 1/16
0
1
1
0
0
000000h - 1FFFFFh
2 MB
Lower 1/8
0
1
1
0
1
000000h - 3FFFFFh
4 MB
Lower 1/4
0
1
1
1
0
000000h - 7FFFFFh
8 MB
Lower 1/2
X
X
1
1
1
000000h - FFFFFFh
16 MB
ALL
1
0
0
0
1
FFF000h - FFFFFFh
4 kB
Upper 1/4096
1
0
0
1
0
FFE000h - FFFFFFh
8 kB
Upper 1/2048
1
0
0
1
1
FFC000h - FFFFFFh
16 kB
Upper 1/1024
1
0
1
0
X
FF8000h - FFFFFFh
32 kB
Upper 1/512
1
0
1
1
0
FF8000h - FFFFFFh
32 kB
Upper 1/512
1
1
0
0
1
000000h - 000FFFh
4 kB
Lower 1/4096
1
1
0
1
0
000000h - 001FFFh
8 kB
Lower 1/2048
1
1
0
1
1
000000h - 003FFFh
16 kB
Lower 1/1024
1
1
1
0
X
000000h - 007FFFh
32 kB
Lower 1/512
1
1
1
1
0
000000h - 007FFFh
32 kB
Lower 1/512



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