M29DW128F datasheet(22/93 Pages) STMICROELECTRONICS

Part #	M29DW128F

Description	128 Mbit (16Mb x8 or 8Mb x16, Multiple Bank, Page, Boot Block) 3V Supply, Flash Memory

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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4 Hardware Protection

M29DW128F

22/93

Hardware Protection

The M29DW128F features hardware protection/unprotection. Refer to Table 9 for details on

hardware block protection/unprotection using VPP/WP and RP pins.

4.1

Write Protect

The VPP/WP pin protects the four outermost parameter blocks (refer to Section 2: Signal

descriptions for a detailed description of the signals).

4.2

Temporary Block Unprotect

When held at VID, the Reset/Block Temporary Unprotect pin, RP, will temporarily unprotect all

the blocks previously protected using a High Voltage Block Protection technique.

Table 9.

Hardware Protection

VPP/WP

Function

VIL

VIH

4 outermost parameter blocks protected from

Program/Erase operations

VID

All blocks temporarily unprotected except the 4

outermost blocks(1)

The temporary unprotection is valid only for the blocks that have been protected using the High Voltage

Protection Technique (see Appendix D: High Voltage Block Protection). The blocks protected using a software

protection method (Standard, Password) do not follow this rules.

VIH or VID

VID

All blocks temporarily unprotected(1)

VPPH

VIH or VID

All blocks temporarily unprotected(1)

M29DW128F Datasheet(PDF) 22 Page - STMicroelectronics