M25PE40 Numonyx, B.V., M25PE40 Datasheet - Page 9

• Manufacturer Part Number: M25PE40
• Description: 4 Mbit, page-erasable serial Flash memory with byte alterability, 75 MHz SPI bus, standard pinout
• Manufacturer: Numonyx, B.V.

M25PE40
2.6
2.7
2.8
Write Protect (W) or Top Sector Lock (TSL)
V
V
V
V
CC
SS
CC
SS
is the reference for the V
The Write Protect function is available in the T9HX process only (see
note on page
The Write Protect (W) input is used to freeze the size of the area of memory that is
protected against write, program and erase instructions (as specified by the values in
the BP2, BP1 and BP0 bits of the Status Register. See
Register (RDSR)
The Top Sector Lock function is available in the T7X process only (see
note on page
The input signal sets the device in the Hardware Protected mode, when Top Sector
Lock (TSL) is connected to V
memory to become read-only (protected from write, program and erase operations).
When Top Sector Lock (TSL) is connected to V
behave like the other pages of memory.
is the supply voltage.
ground
supply voltage
6).
6).
for a description of these bits.
CC
supply voltage.
SS
, causing the top 256 pages (upper addresses) of the
CC
, the top 256 pages of memory
Section 6.4: Read Status
Signal description
Important
Important
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