M25PE80 datasheet(16/66 Pages) NUMONYX

Part #	M25PE80

Description	8-Mbit, page-erasable serial flash memory with byte alterability, 75 MHz SPI bus, standard pinout

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Manufacturer	NUMONYX [Numonyx B.V]

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Operating features

M25PE80

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Table 2.

Software protection truth table (sectors 0 to 15, 64-Kbyte granularity)

Sector lock register

Protection status

Lock

down bit

Write

lock bit

0

Sector unprotected from program/erase/write operations, protection status reversible

0

1

Sector protected from program/erase/write operations, protection status reversible

10

Sector unprotected from program/erase/write operations,

Sector protection status cannot be changed except by a reset or power-up.

11

Sector protected from program/erase/write operations,

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

register

Subsector lock

register

Protection status

Lock

down

bit

Write

lock

bit

Lock

down

bit

Write

lock

bit

0

00

Current subsector unprotected from program/erase/write operations,

Current subsector protection status reversible

01

Current subsector protected from program/erase/write operations,

Current subsector protection status reversible.

10

Current subsector unprotected from program/erase/write operations, current

subsector protection status cannot be changed except by a reset or power-up.

11

Current subsector protected from program/erase/write operations, Current

subsector protection status cannot be changed except by a reset or power-up.

1

01

All subsectors protected from program/erase/write operations, current subsector

protection status reversible

11

All subsectors protected from program/erase/write operations, current subsector

protection status cannot be changed except by a reset or power-up.

1

0

10

Current subsector unprotected from program/erase/write operations, all

subsectors protection status cannot be changed except by a reset or power-up

11

Current subsector protected from program/erase/write operations, all subsectors

protection status cannot be changed except by a reset or power-up

111

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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