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M25P64 Fiches technique(PDF) 19 Page - STMicroelectronics

No de pièce M25P64
Description  64 Mbit, Low Voltage, Serial Flash Memory With 50MHz SPI Bus Interface
PDF  38 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M25P64 Fiches technique(HTML) 19 Page - STMicroelectronics

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M25P64
–
by setting the Status Register Write Disable
(SRWD) bit after driving Write Protect (W) Low
–
or by driving Write Protect (W) Low after
setting the Status Register Write Disable
(SRWD) bit.
The only way to exit the Hardware Protected Mode
(HPM) once entered is to pull Write Protect (W)
High.
If Write Protect (W) is permanently tied High, the
Hardware Protected Mode (HPM) can never be
activated, and only the Software Protected Mode
(SPM), using the Block Protect (BP2, BP1, BP0)
bits of the Status Register, can be used.
Figure 13. Write Status Register (WRSR) Instruction Sequence
C
D
AI02282D
S
Q
2
1
3456789 10 11 12 13 14 15
High Impedance
Instruction
Status
Register In
0
765432
0
1
MSB



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