M25PX16 Numonyx, M25PX16 Datasheet - Page 15

• Manufacturer Part Number: M25PX16
• Description: 16-mbit, Dual I/o, 4-kbyte Subsector Erase, Serial Flash Memory With 75 Mhz Spi Bus Interface
• Manufacturer: Numonyx

Table 2.
Table 3.
TB
bit
Down bit
0
0
0
0
0
0
0
0
1
1
1
1
1
1
Lock
Status Register
The definition of the Lock Register bits is given in
Sector Lock
the second software protected mode (SPM2) uses the Block Protect bits (see
Section 6.4.3: BP2, BP1, BP0
allow part of the memory to be configured as read-only.
0
0
1
1
bit 2
Register
contents
BP
0
0
0
0
1
1
1
1
0
0
0
0
1
1
modification to the Write Lock and Lock Down bits cannot be performed. A power-
up, is required before changes to these bits can be made. When the Lock Down
bit is reset, ‘0’, the Write Lock and Lock Down bits can be changed.
bit 1
BP
Lock bit
Software protection truth table (Sectors 0 to 63, 64 Kbyte granularity)
Protected area sizes
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Write
0
1
0
1
bit 0
BP
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Sector unprotected from Program/Erase/Write operations, protection status
reversible
Sector protected from Program/Erase/Write operations, protection status
reversible
Sector unprotected from Program/Erase/Write operations,
Sector protection status cannot be changed except by a power-up.
Sector protected from Program/Erase/Write operations,
Sector protection status cannot be changed except by a Power-up.
none
Upper 32nd (Sector 31)
Upper 16th (2 sectors: 30 and 31)
Upper 8th (4 sectors: 28 to 31)
Upper 4th (8 sectors: 24 to 31)
Upper half (16 sectors: 16 to 31)
All sectors (32 sectors: 0 to 31)
All sectors (32 sectors: 0 to 31)
none
Lower 32nd (sector 0)
Lower 16th (2 sectors: 0 and 1)
Lower 8th (4 sectors: 0 to 3)
Lower 4th (8 sectors: 0 to 7)
Lower half (16 sectors: 0 to 15)
Protected area
bits) and the Top/Bottom bit (see
Protection status
Memory content
Table 9: Lock Register
All sectors
Lower 31/32nds (31 sectors: 0 to 30)
Lower 15/16ths (30 sectors: 0 to 29)
Lower half (16 sectors: 0 to 15)
All sectors
Upper 31/32nds (31 sectors: 1 to 31)
Upper 15/16ths (30 sectors: 2 to 31)
Upper half (16 sectors: 16 to 31)
Lower 7/8ths (28 sectors: 0 to 27)
Lower 3/4ths (24 sectors: 0 to 23)
none
none
Upper 7/8ths (28 sectors: 4 to 31)
Upper 3/4ths (24 sectors: 8 to 31)
Unprotected area
(1)
(1)
Section 6.4.4: TB
(32 sectors: 0 to 31)
(32 sectors: 0 to 31)
out.
bit) to
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