M29W128 View Datasheet(PDF) - Numonyx -> Micron

Part Name

Description

Manufacturer

M29W128

128 Mbit 3V Supply Flash Memory

Numonyx -> Micron 

M29W128FH, M29W128FL

Command interface

5.2.8

5.2.9

5.2.10

5.2.11

Octuple Byte Program command

This is used to write eight adjacent Bytes, in x8 mode, simultaneously. The addresses of the

eight Bytes must differ only in A1, A0 and DQ15A-1.

Nine bus write cycles are necessary to issue the command:

1. The first bus cycle sets up the command.

2. The second bus cycle latches the Address and the Data of the first Byte to be written.

3. The third bus cycle latches the Address and the Data of the second Byte to be written.

4. The fourth bus cycle latches the Address and the Data of the third Byte to be written.

5. The fifth bus cycle latches the Address and the Data of the fourth Byte to be written.

6. The sixth bus cycle latches the Address and the Data of the fifth Byte to be written.

7. The seventh bus cycle latches the Address and the Data of the sixth Byte to be written.

8. The eighth bus cycle latches the Address and the Data of the seventh Byte to be

written.

9. The ninth bus cycle latches the Address and the Data of the eighth Byte to be written

and starts the Program/Erase Controller.

Unlock Bypass command

The Unlock Bypass command is 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.

Once the Unlock Bypass command has been issued, the memory enters Unlock Bypass

mode. When in Unlock Bypass mode, only the Unlock Bypass Program and Unlock Bypass

Reset commands are valid. The Unlock Bypass Program command can then be issued to

program addresses within the memory, or 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.

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.

Unlock Bypass Reset command

The Unlock Bypass Reset command can be used to return to Read/Reset mode from

Unlock Bypass mode. Two Bus Write operations are required to issue the Unlock Bypass

Reset command. Read/Reset command does not exit from Unlock Bypass mode.

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