M29DW323DT70ZE6E datasheet(43/51 Pages) NUMONYX

Part #	M29DW323DT70ZE6E

Description	32 Mbit (4Mb x8 or 2Mb x16, Dual Bank 8:24, Boot Block) 3V Supply Flash Memory

Download	51 Pages

Scroll/Zoom	100%

Manufacturer	NUMONYX [Numonyx B.V]

Direct Link	http://www.numonyx.com

Logo

43 / 51 page

43/51

M29DW323DT, M29DW323DB

APPENDIX C. EXTENDED MEMORY BLOCK

The M29DW323D has an extra block, the Extend-

ed Block, that can be accessed using a dedicated

command.

This Extended Block is 32 KWords in x16 mode

and 64 KBytes in x8 mode. It is used as a security

block (to provide a permanent security identifica-

tion number) or to store additional information.

The Extended Block is either Factory Locked or

Customer Lockable, its status is indicated by bit

DQ7. This bit is permanently set to either ‘1’ or ‘0’

at the factory and cannot be changed. When set to

‘1’, it indicates that the device is factory locked and

the Extended Block is protected. When set to ‘0’, it

indicates that the device is customer lockable and

the Extended Block is unprotected. Bit DQ7 being

permanently locked to either ‘1’ or ‘0’ is another

security feature which ensures that a customer

lockable device cannot be used instead of a facto-

ry locked one.

Bit DQ7 is the most significant bit in the Extended

Block Verify Code and a specific procedure must

be followed to read it. See “Extended Memory

Block Verify Code” in Tables 3 and 4, Bus Opera-

tions, BYTE = VIL and Bus Operations, BYTE =

VIH, respectively, for details of how to read bit

DQ7.

The Extended Block can only be accessed when

the device is in Extended Block mode. For details

of how the Extended Block mode is entered and

exited, refer to the Enter Extended Block Com-

mand and Exit Extended Block Command para-

graphs, and to Tables 5 and 6, “Commands, 16-bit

mode, BYTE = VIH” and “Commands, 8-bit mode,

BYTE = VIL”, respectively.

Factory Locked Extended Block

In devices where the Extended Block is factory

locked, the Security Identification Number is writ-

ten to the Extended Block address space (see Ta-

ble 31., Extended Block Address and Data) in the

factory. The DQ7 bit is set to ‘1’ and the Extended

Block cannot be unprotected.

Customer Lockable Extended Block

A device where the Extended Block is customer

lockable is delivered with the DQ7 bit set to ‘0’ and

the Extended Block unprotected. It is up to the

customer to program and protect the Extended

Block but care must be taken because the protec-

tion of the Extended Block is not reversible.

There are two ways of protecting the Extended

Block:

■

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 APPENDIX D.,

In-System Technique and to the

corresponding flowcharts, Figures 22 and 23,

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

APPENDIX D., Programmer Technique and to

the corresponding flowcharts, Figures 20 and

21, for a detailed explanation of the

technique).

Once the Extended Block is programmed and pro-

tected, the Exit Extended Block command must be

issued to exit the Extended Block mode and return

the device to Read mode.

Table 31. Extended Block Address and Data

Note: 1. See Tables 23 and 24, Top and Bottom Boot Block Addresses.

Device

Address(1)

Data

x8

x16

Factory Locked

Customer Lockable

M29DW323DT

3F0000h-3F000Fh

1F8000h-1F8007h

Security Identification

Number

Determined by

Customer

3F0010h-3FFFFFh

1F8008h-1FFFFFh

Unavailable

M29DW323DB

000000h-00000Fh

000000h-000007h

Security Identification

Number

Determined by

Customer

000010h-00FFFFh

000008h-007FFFh

Unavailable

Similar Part No. - M29DW323DT70ZE6E

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	M29DW323DT70ZE6E	818Kb / 49P	32 Mbit 4Mb x8 or 2Mb x16, Dual Bank 8:24, Boot Block 3V Supply Flash Memory

More results

Similar Description - M29DW323DT70ZE6E

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	M29DW323DT	818Kb / 49P	32 Mbit 4Mb x8 or 2Mb x16, Dual Bank 8:24, Boot Block 3V Supply Flash Memory
	M29W320DT	524Kb / 56P	32 Mbit 4Mb x8 or 2Mb x16, Boot Block 3V Supply Flash Memory
	M29W320ET	887Kb / 46P	32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash Memory
	M29DW324DT	815Kb / 49P	32 Mbit 4Mb x8 or 2Mb x16, Dual Bank 16:16, Boot Block 3V Supply Flash Memory
Numonyx B.V	M29DW324DT	1Mb / 50P	32 Mbit (4Mb x8 or 2Mb x16, Dual Bank 16:16, Boot Block) 3V Supply Flash Memory
STMicroelectronics	M58LW032D	799Kb / 50P	32 Mbit (4Mb x8, 2Mb x16, Uniform Block) 3V Supply Flash Memory
STMicroelectronics	M58LW032D	748Kb / 51P	32 Mbit 4Mb x8, 2Mb x16, Uniform Block 3V Supply Flash Memory
Numonyx B.V	M28W320FCT	1Mb / 69P	32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory
STMicroelectronics	M28W320CT	414Kb / 42P	32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory
STMicroelectronics	M28W320BT	211Kb / 43P	32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory May 2002

More results

M29DW323DT70ZE6E Datasheet(PDF) 43 Page - Numonyx B.V

M29DW323DT70ZE6E Datasheet(HTML) 43 Page - Numonyx B.V

Similar Part No. - M29DW323DT70ZE6E

Similar Description - M29DW323DT70ZE6E

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Datasheet Download

Link URL