M29W128GH70N3E datasheet(37/94 Pages) NUMONYX

Part #	M29W128GH70N3E

Description	128-Mbit (16 Mbit x8 or 8 Mbit x16, page, uniform block) 3 V supply flash memory

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Manufacturer	NUMONYX [Numonyx B.V]

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M29W128GH, M29W128GL

Command interface

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6.2.4

Write to Buffer Program Confirm command

The Write to Buffer Program Confirm command is used to confirm a Write to Buffer Program

command and to program the N+1 words/bytes loaded in the write buffer by this command.

6.2.5

Enhanced Buffered Program Confirm command

The Enhanced Buffered Program Confirm command is used to confirm an Enhanced

Buffered Program command and to program the 256 words loaded in the buffer.

6.2.6

Unlock Bypass command

The Unlock Bypass command is used to place the device in unlock bypass mode. When the

device enters the unlock bypass mode, the two initial unlock cycles required in the standard

program command sequence are no more needed, and only two write cycles are required to

program data, instead of the normal four cycles (see Note 5 below Table 10 and Table 11).

This results in a faster total programming time.

Unlock Bypass command is consequently used in conjunction with the Unlock Bypass

Program command to program the memory faster than with the standard program

commands. When the cycle time to the device is long, considerable time saving can be

made by using these commands. Three bus write operations are required to issue the

Unlock Bypass command.

When in unlock bypass mode, only the Unlock Bypass Program, Unlock Bypass Block

Erase, Unlock Bypass Chip Erase, and Unlock Bypass Reset commands are valid:

The Unlock Bypass Program command can be issued to program addresses within the

memory

The Unlock Bypass Block Erase command can then be issued to erase one or more

memory blocks

The Unlock Bypass Chip Erase command can be issued to erase the whole memory

array

The Unlock Bypass Write to Buffer Program command can be issued to speed up

programming operation

The Unlock Bypass Enhanced Buffered Program command can be issued to speed up

programming operation

The Unlock Bypass Reset command can be issued to return the memory to read mode.

In unlock bypass mode the memory can be read as if in read mode.

6.2.7

Unlock Bypass Program command

The Unlock Bypass Program command can be used to program one address in the memory

array at a time. The command requires two bus write operations, the final write operation

latches the address and data and starts the program/erase controller.

The program operation using the Unlock Bypass Program command behaves identically to

the program operation using the Program command. The operation cannot be aborted, a

bus read operation to the memory outputs the status register. See the Program command

for details on the behavior.

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