M29DW641F datasheet(33/80 Pages) NUMONYX

Part #	M29DW641F

Description	64 Mbit (4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory

Download	80 Pages

Scroll/Zoom	100%

Manufacturer	NUMONYX [Numonyx B.V]

Direct Link	http://www.numonyx.com

Logo

33 / 80 page

M29DW641F

Command interface

33/80

6.3

Block Protection commands

Blocks or groups of blocks can be protected against accidental program, Erase or Read

Operations. The Protection Groups are shown in

Appendix A, Table 28: Block Addresses.

The device block protection scheme is shown in

Figure 6: Software Protection scheme and

Figure 5: Block Protection state diagram. See Table 10: Block Protection commands, for a

summary of the Block Protection commands.

Only the commands related to the Extended Block Protection are available in both 8 bit and

16 bit memory configuration. The other block protection commands are available in 16-bit

configuration only.

6.3.1

Enter Extended Block command

The M29DW641F has one extra 128-Word block (Extended Block) that can only be

accessed using the Enter Extended Block command.

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

command has been issued the device enters Extended Block mode where all Bus Read or

Program Operations to the Extended Block Addresses (see

Table 28: Block Addresses).

The Extended Block cannot be erased, and can be treated as one-time programmable

(OTP) memory. In Extended Block mode only array cell locations (Bank A) with the same

addresses as the Extended Block are not accessible. In Extended Block mode Dual

Operations are allowed and the Extended Block physically belongs to Bank A.

In Extended Block mode, Erase, Chip Erase, Erase Suspend and Erase resume commands

are not allowed.

To exit from the Extended Block mode the Exit Extended Block command must be issued.

The Extended Block can be protected by setting the Extended Block Protection bit to ‘1’;

however once protected the protection cannot be undone.

6.3.2

Exit Extended Block command

The Exit Extended Block command is used to exit from the Extended Block mode and return

the device to Read mode. Four Bus Write Operations are required to issue the command.

6.3.3

Set Extended Block Protection bit command

The Set Extended Block Protection bit command programs the Extended Block Protection

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

A Read/Reset command must be issued to abort a Set Extended Block Protection bit

command.

Six successive steps are required to issue the Set Extended Block Protection bit command.

1.

The command starts with two unlock cycles.

2.

The third Bus Write cycle sets up the Set Extended Block Protection bit command.

3.

The last three cycles verify the value programmed at the Extended Block Protection bit

address: if bit DQ0 of Data Inputs/Outputs is set to ’1’, it indicates that the Extended

Block Protection bit has been successfully programmed. If DQ0 is ‘0’, the Set Extended

Block Protection bit command must be issued and verified again.

Similar Part No. - M29DW641F

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	M29DW640D	945Kb / 55P	64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
	M29DW640D70N1	945Kb / 55P	64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
	M29DW640D70N1	1Mb / 15P	FLASH NOR HIGH DENSITY & CONSUMER
	M29DW640D70N1E	945Kb / 55P	64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
	M29DW640D70N1E	1Mb / 15P	FLASH NOR HIGH DENSITY & CONSUMER

More results

Similar Description - M29DW641F

Manufacturer	Part #	Datasheet	Description
Numonyx B.V	M29DW640F	1Mb / 74P	64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
STMicroelectronics	M29DW640D	945Kb / 55P	64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
	M28W640ECT	838Kb / 55P	64 Mbit 4Mb x16, Boot Block 3V Supply Flash Memory
	M28W640CT	393Kb / 54P	64 Mbit 4Mb x16, Boot Block 3V Supply Flash Memory
	M28W640FCB	1Mb / 55P	64 Mbit (4Mb x16, Boot Block) 3V Supply Flash Memory
	M29W640FT	478Kb / 72P	64 Mbit (8Mb x8 or 4Mb x16, Page, Boot Block) 3V Supply Flash Memory
Numonyx B.V	M29W640FT	1Mb / 71P	64 Mbit (8Mb x8 or 4Mb x16, Page, Boot Block) 3V Supply Flash Memory
STMicroelectronics	M58WR064FT	573Kb / 87P	64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V Supply Flash Memory
	M29W640DT	945Kb / 49P	64 Mbit 8Mb x8 or 4Mb x16, Boot Block 3V Supply Flash Memory
	M29W641DH	641Kb / 42P	64 Mbit 4Mb x16, Uniform Block 3V Supply Flash Memory

More results

M29DW641F Datasheet(PDF) 33 Page - Numonyx B.V

M29DW641F Datasheet(HTML) 33 Page - Numonyx B.V

Similar Part No. - M29DW641F

Similar Description - M29DW641F

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 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Datasheet Download

Link URL