M29DW128F datasheet(22/94 Pages) STMICROELECTRONICS

Part #	M29DW128F

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

PDF	94 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Hardware Protection

M29DW128F

22/94

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)

VIH or VID

VID

All blocks temporarily unprotected(1)

VPPH

VIH or VID

All blocks temporarily unprotected(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.

M29DW128F Datasheet(PDF) 22 Page - STMicroelectronics