M25PE80-VMN6TP データシートの表示（PDF） - STMicroelectronics

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M25PE80-VMN6TP

8 Mbit, low-voltage, Page-Erasable Serial Flash memory with byte alterability, 50 MHz SPI bus, standard pinout

STMicroelectronics 

Operating features

M25PE80

Table 2. Software protection truth table (Sectors 0 to 15, 64-Kbyte granularity)

Sector Lock Register

Lock

Write

Down Bit Lock Bit

Protection Status

0

0 Sector Unprotected from Program/Erase/Write operations, Protection Status Reversible

0

1 Sector Protected from Program/Erase/Write operations, Protection Status Reversible

1

0

Sector Unprotected from Program/Erase/Write operations,

Sector Protection Status cannot be changed except by a Reset or Power-up.

Sector Protected from Program/Erase/Write operations,

1

1

Sector Protection Status cannot be changed except by a Reset or Power-up.

Table 3.

Not for new design: TY7 process only, Software protection scheme truth

table (Sectors 0 and 15)(1) (2) (3)

Sector Lock Subsector

Register Lock Register

Lock Write Lock Write

Down Lock Down Lock

Bit Bit Bit Bit

Protection Status

0

0

Current subsector Unprotected from Program/Erase/Write operations,

Current subsector Protection Status Reversible

Current subsector Protected from Program/Erase/Write operations,

0

1

Current subsector Protection Status Reversible.

0

1

0

Current subsector Unprotected from Program/Erase/Write operations, Current

subsector Protection Status cannot be changed except by a Reset or Power-up.

0

1

1

Current subsector Protected from Program/Erase/Write operations, Current

subsector Protection Status cannot be changed except by a Reset or Power-up.

0

1

All subsectors Protected from Program/Erase/Write operations, Current

subsector Protection Status Reversible

1

1

1

All subsectors Protected from Program/Erase/Write operations, Current

subsector Protection Status cannot be changed except by a Reset or Power-up.

1

0

Current subsector Unprotected from Program/Erase/Write operations, All

subsectors Protection Status cannot be changed except by a Reset or Power-up

0

1

1

1

Current subsector Protected from Program/Erase/Write operations, All

subsectors Protection Status cannot be changed except by a Reset or Power-up

1

1

1

All subsectors Protected with their Protection Status cannot be changed except

by a Reset or Power-up.

1. All other bit combinations are not-applicable.

2. For more details, refer to the description of the Write to Lock Register (WRLR) instruction.

3. See Important note on page 6 for differences between devices produced in T7Y and T9HX processes.

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