M25PE80-VMP6G STMicroelectronics, M25PE80-VMP6G Datasheet - Page 37

• Manufacturer Part Number: M25PE80-VMP6G
• Description: SERIAL FLASH
• Manufacturer: STMicroelectronics

M25PE80
Table 13.
1. The table rows in gray are true for products processed in the T7Y process only.
2. b6-b4 and b1-b0 must be reset to ‘0’.
3. b6-b2 must be reset to ‘0’.
For products processed in the T7Y process only (see
Protection always prevails:
Note that when the WRLR instruction acts both on Write Lock (WL) and Lock Down (LD)
bits, it firstly programs the WL bit, and then the LD bit.
As an example, if a subsector Lock Register settings are xxxx0101b and a WRLR instruction
is issued with a Lock Register In data set to 00000010b:
1.
2.
All Sectors in T9HX process
All Sectors except for Sector 0
and Sector 15 in T7Y process
Sector 0, Sector 15 in T7Y
process
When the Lock Down Bit of Sector 0 or Sector 15 is set to ‘1’.
–
–
When the Write Lock Bit of Sector 0 or Sector 15 is set to ‘1’.
–
–
When the Write Lock Bit of Sector 0 or Sector 15 is reset to ‘0’.
–
–
When the Write Lock Bit of any sector or subsector is set to ‘1’, any instruction that may
modify the contents of this sector or subsector will be rejected (including Sector Erase
and Bulk Erase).
the sector WL bit is first set to ‘0’ (and all subsectors that are not locked-down will have
their WL bit reset to ‘0’).
the sector LD bit and all subsectors LD bits are set to ‘1’. In this case, the final value of
the above subsector Lock Register is xxxx1010b.
If the Lock Down Bit of Sector 0 is ‘1’, all the Lock Down Bits of the subsectors in
Sector 0 are forced to ‘1’.
If the Lock Down Bit of Sector 15 is ‘1’, all the Lock Down Bits of the subsectors in
Sector 15 are forced to ‘1’
if the Write Lock Bit of Sector 0 is ‘1’, the Write Lock Bits of all the subsectors in
Sector 0 are forced to ‘1’ (even if their Lock Down Bits are set to ‘1’).
if the Write Lock Bit of Sector 15 is ‘1’, the Write Lock Bits of all the subsectors in
Sector 15 are forced to ‘1’ (even if their Lock Down Bits are set to ‘1’).
if the Write Lock Bit of Sector 0 is ‘0’, all the subsectors in Sector 0 whose Lock
Down Bit is ‘0’ have their Write Lock Bits forced to ‘0’.
if the Write Lock Bit of Sector 15 is ‘0’, all the subsectors in Sector 15 whose Lock
Down Bit is ‘0’ have their Write Lock Bits forced to ‘0’.
Sector
Not for new design: Lock Registers for the M25PE80 in T7Y process
b7-b2
Bit
b1
b0
b7
b3
b2
b1
b0
Sector Lock Down Bit Value (refer to
Sector Write Lock Bit Value (refer to
Subsector Lock Down Bit value (refer to
Subsector Write Lock Bit Value (refer to
Sector Lock Down Bit Value (refer to
Sector Write Lock Bit Value (refer to
‘1’
‘0’
Only b3 and b2 are taken into account to modify
the subsector Write Lock and Lock Down bits
Only b1 and b0 are taken into account to modify
the sector Write Lock and Lock Down bits
Value
‘0’
Important
Table
Table
Table
Table
Table
Table
note):
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Instructions
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