M28W640FST データシートの表示（PDF） - STMicroelectronics

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M28W640FST

32Mbit (2Mb x16) and 64Mbit (4Mb x16) 3V Supply, Boot Block, Secure Flash Memories

STMicroelectronics 

M28W320FST, M28W320FSB, M28W640FST, M28W640FSB

HARDWARE PROTECTION

All devices feature hardware protection. Refer to

SIGNAL DESCRIPTIONS section for a detailed

description of these signals.

VPP ≤VPPLK. The VPP pin protects all the blocks.

Refer to SIGNAL DESCRIPTIONS section for a

detailed description of these signals.

SECURITY FEATURES

The M28W320FS and M28W640FS are equipped

with KRYPTO Security features performing soft-

ware protection. They allow any block to be pro-

tected from program/erase or read operations:

■ Modify Protection including Volatile Block

Lock/Unlock, Non-Volatile Block Modify

Protection, Non-Volatile Password Modify

Protection and Irreversible Protection.

■ Read Protection.

The KRYPTO features (Modify Protection mode,

Read Protection mode and Device Authentication

mechanism) are not described in this Datasheet.

For further details concerning these additional pro-

tection modes please contact ST Sales Offices.

The devices also feature a 64 bit Unique Device

Identifier and a 128 bit user-programmable OTP

segment (see Figure 7., Protection Register Mem-

ory Map and Protection Register Program Com-

mand).

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