M29W128GL60N6E View Datasheet(PDF) - Numonyx -> Micron

Part Name

Description

Manufacturer

M29W128GL60N6E

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

Numonyx -> Micron 

Command interface

M29W128GH, M29W128GL

6.3

6.3.1

Note:

6.3.2

Protection commands

Blocks can be protected individually against accidental program, erase or read operations.

The device block protection scheme is shown in Figure 5: Software protection scheme. See

either Table 15, or Table 16, depending on the configuration that is being used, for a

summary of the Block Protection commands.

Block protection commands are available both in 8-bit and 16-bit configuration.

The memory block and Extended Memory block protection is configured through the Lock

register (see Section 7.1: Lock Register).

Enter Extended Memory Block command

The M29W128GH/L has one extra 128-word block (extended memory block) that can only

be accessed using the Enter Extended Memory Block command.

Three Bus Write cycles are required to issue the Extended Memory Block command. Once

the command has been issued the device enters the Extended Memory Block mode where

all Bus Read or Program operations are conducted on the extended memory block. Once

the device is in the Extended Block mode, the extended memory block is addressed by

using the addresses occupied by block 0 in the other operating modes (see Table 34: Block

addresses).

The device remains in Extended Memory Block mode until the Exit Extended Memory Block

command is issued or power is removed from the device. After power-up or a hardware

reset, the device reverts to the Read mode, and the commands issued to block 0 addresses

will properly address block 0.

The extended memory block cannot be erased, and can be treated as one-time

programmable (OTP) memory.

In Extended Block mode, Erase, Chip Erase, Erase Suspend and Erase Resume

commands are not allowed.

To exit from the Extended Memory Block mode the Exit Extended Memory Block command

must be issued.

The Extended Memory Block can be protected by setting the Extended Memory Block

Protection bit to ‘1’ (see Section 7.1: Lock Register); however once protected the protection

cannot be undone.

When the device is in the Extended Memory Block mode, the VPP/WP pin cannot be used

for fast programming and the Unlock Bypass mode is not available (see Section 2.8:

VPP/Write Protect (VPP/WP)).

Exit Extended Memory Block command

The Exit Extended Memory Block command is used to exit from the Extended Memory

Block mode and return the device to Read mode. Four Bus Write operations are required to

issue the command.

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