MX25L12835F Datasheet, PDF (70/102 Pages) Macronix International – 3V 128M-BIT [x 1/x 2/x 4] CMOS MXSMIO (SERIAL MULTI I/O) FLASH MEMORY

MX25L12835F
9-32-4. Dynamic Write Protection Bits
The Dynamic Protection features a volatile type protection to each individual sector. It can protect sectors from
unintentional change, and is easy to disable when there are necessary changes.
All DPBs are default as protected (FFh) after reset or upon power up cycle. Via setting up Dynamic Protection bit (DPB)
by write DPB command (WRDPB), user can cancel the Dynamic Protection of associated sector.
The Dynamic Protection only works on those unprotected sectors whose SPBs are cleared. After the DPB state is
cleared to “0”, the sector can be modified if the SPB state is unprotected state.
DPB Register
Bit
Description
Bit Status
7 to 0
DPB (Dynamic protected Bit)
00h= DPB for the sector address unprotected
FFh= DPB for the sector address protected
Default
FFh
Type
Volatile
Figure 66. Read DPB Register (RDDPB) Sequence
CS#
Mode 3
SCLK
Mode 0
SI
SO
0123456789
37 38 39 40 41 42 43 44 45 46 47
Command
E0h
High-Z
32-Bit Address
(Note)
A31 A30
MSB
A2 A1 A0
Data Out
76543210
MSB
Note: One dummy byte follow 3-byte address.
Figure 67. Write DPB Register (WRDPB) Sequence
CS#
Mode 3
SCLK
Mode 0
SI
0123456789
37 38 39 40 41 42 43 44 45 46 47
Command
E1h
32-Bit Address
(Note)
Data Byte 1
A31 A30
MSB
A2 A1 A0 _{7 6 5 4 3 2 1 0}
MSB
Note: One dummy byte follow 3-byte address.
P/N: PM1795
70
REV. 1.3, OCT. 31, 2013