M29W128GH70N6F View Datasheet(PDF) - Numonyx -> Micron

Part Name

Description

MFG CO.

M29W128GH70N6F

128 Mbit (16 Mb x 8 or 8 Mbx 16, page, uniform block) 3 V supply Flash memory

Numonyx -> Micron 

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Software protection

Figure 5. Software protection scheme

M29W128GH, M29W128GL

Parameter block or

main block

VPB(2)

NVPB(1)

Volatile protection

Non-volatile protection

NVPB Lock bit(3)

Non-volatile

protection mode

Password protection

mode

AI13676

1. NVPBs default to ‘1’ (block unprotected) after power-up and hardware reset. A block is protected or unprotected when its

NVPB is set to ‘0’ and ‘1’, respectively. NVPBs are programmed individually and cleared collectively.

2. VPB default status depends on ordering option. A block is protected or unprotected when its VPB is set to ‘0’ and ‘1’,

respectively. VPBs are programmed and cleared individually. For the volatile protection to be effective, the NVPB Lock bit

must be set to ‘0’ (NVPB bits unlocked) and the block NVPB must be set to ‘1’ (block unprotected).

3. The NVPB Lock bit is volatile and default to ‘1’ (NVPB bits unlocked) after power-up and hardware reset. NVPB bits are

locked by setting the NVPB Lock bit to ‘0’. Once programmed to ‘0’, the NVPB Lock bit can be reset to ‘1’ only be taking the

device through a power-up or hardware reset.

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