M95128-BN3 STMICROELECTRONICS [STMicroelectronics], M95128-BN3 Datasheet - Page 16
M95128-BN3
Manufacturer Part Number
M95128-BN3
Description
256Kbit and 128Kbit Serial SPI Bus EEPROM With High Speed Clock
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.M95128-BN3.pdf
(39 pages)
- Current page: 16 of 39
- Download datasheet (579Kb)
M95256, M95128
Regardless of the order of the two events, the
Hardware Protected Mode (HPM) can be entered:
–
–
Figure 11. Write Status Register (WRSR) Sequence
16/39
(BP1, BP0) bits of the Status Register, are
also hardware protected against data
modification.
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.
S
C
D
Q
0
1
High Impedance
2
Instruction
3
4
5
6
7
MSB
7
8
6
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 (BP1, BP0) bits of
the Status Register, can be used.
9 10 11 12 13 14 15
5
Register In
4
Status
3
2
1
0
AI02282D
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