M29DW128F datasheet(84/94 Pages) NUMONYX

Part #	M29DW128F

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

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Manufacturer	NUMONYX [Numonyx B.V]

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Extended Memory Block

M29DW128F

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C.2

Customer Lockable Section of the Extended Block

The device is delivered with the second section of the Extended Block "Customer Lockable": bits DQ7

and DQ6 are set to '1' and '0' respectively. It is up to the customer to program and protect this section of

the Extended Block but care must be taken because the protection is not reversible.

There are three ways of protecting this section:

●

Issue the Enter Extended Block command to place the device in Extended Block mode, then use the

In-System Technique with RP either at VIH or at VID. Refer to Section D.2: In-System technique in

Appendix D: High Voltage Block Protection, and to the corresponding flowcharts Figure 25 and

Figure 26 for a detailed explanation of the technique).

●

Issue the Enter Extended Block command to place the device in Extended Block mode, then use the

Programmer Technique. Refer to

Section D.1: Programmer technique in Appendix D: High Voltage

Block Protection, and to the corresponding flowcharts Figure 23 and Figure 24 for a detailed

explanation of the technique).

●

Issue a Set Extended Block Protection bit command to program the Extended Block Protection bit to

‘1’ thus preventing the second section of the Extended Block from being programmed.

Bit DQ6 of the Extended Block Protection Indicator is automatically set to '1' to indicate that the second

section of the Extended Block is Customer Locked.

Once the Extended Block is programmed and protected, the Exit Extended Block command must be

issued to exit the Extended Block mode and return the device to Read mode.

Table 41.

Extended Block Address and Data

Device

Address(1)

Data

x8

x16

Factory Locked

Customer Lockable

M29DW128F

000000h-

00007Fh

000000h-

00003Fh

Random Number, ESN(2),

Security Identification Number

Unavailable

000080h-

0000FFh

000040h-

00007Fh

Unavailable

Determined by

Customer

1.

See

Table 34: Block Addresses and Protection Groups.

2.

ESN = Electronic Serial Number.

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