M28W640FSU データシートの表示（PDF） - STMicroelectronics

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M28W640FSU

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

STMicroelectronics 

M28W320FSU, M28W640FSU

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 memo-

ry blocks from program and erase operations. Re-

fer to SIGNAL DESCRIPTIONS section for a

detailed description of these signals.

SECURITY FEATURES

The M28W320FSU and M28W640FSU are

equipped with KRYPTO Security features per-

forming software protection. They allow any block

to be protected from program/erase or read oper-

ations:

■ 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 6., Protection Register Mem-

ory Map and Protection Register Program Com-

mand).

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