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M25PE40VMP6P Datasheet(PDF) 16 Page - STMicroelectronics

Part # M25PE40VMP6P
Description  4 Mbit, low voltage, Page-Erasable Serial Flash memory with byte alterability, 50 MHz SPI bus, standard pinout
PDF  60 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M25PE40VMP6P Datasheet(HTML) 16 Page - STMicroelectronics

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Operating features
M25PE40
16/60
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The second Software Protected mode (SPM2) uses the Block Protect (BP2, BP1,
BP0, see Section 6.4.3)) bits to allow part of the memory to be configured as read-only.
Table 2.
Software protection truth table (Sectors 0 to 7, 64-Kbyte granularity)
Sector Lock Register
Protection status
Lock
Down bit
Write
Lock bit
00
Sector unprotected from Program/Erase/Write operations, Protection status
reversible
01
Sector protected from Program/Erase/Write operations, Protection status
reversible
10
Sector Unprotected from Program/Erase/Write operations,
Sector Protection Status cannot be changed except by a Reset or Power-up.
11
Sector Protected from Program/Erase/Write operations,
Sector Protection Status cannot be changed except by a Reset or Power-up.
Table 3.
Protected area sizes
Status Register
content
Memory content
BP2
Bit
BP1
Bit
BP0
Bit
Protected area
Unprotected area
0
0
0
none
All sectors(1) (eight sectors: 0 to 7)
1.
The device is ready to accept a Bulk Erase instruction if, and only if, all Block Protect (BP2, BP1, BP0) are
0.
0
0
1
Upper eighth (Sector 7)
Lower seven-eighths (seven sectors: 0 to
6)
0
1
0
Upper quarter (two sectors: 6 and 7) Lower three-quarters (six sectors: 0 to 5)
0
1
1
Upper half (four sectors: 4 to 7)
Lower half (four sectors: 0 to 3)
1
0
0
All sectors (eight sectors: 0 to 7)
none
1
0
1
All sectors (eight sectors: 0 to 7)
none
1
1
0
All sectors (eight sectors: 0 to 7)
none
1
1
1
All sectors (eight sectors: 0 to 7)
none



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