256Mb: 3V Embedded Parallel NOR Flash
Erase Operations
Both READ and PROGRAM operations behave normally on these blocks. Reading from
blocks that are suspended will output the status register. If any attempt is made to pro-
gram in a protected block or in the suspended block, the PROGRAM command is ignor-
ed, and the data remains unchanged. In this case, the status register is not read, and no
error condition is given.
It is also possible to issue the AUTO SELECT command after entering auto select mode.
The READ/RESET command must be issued to return the device to read array mode be-
fore the ERASE RESUME command will be accepted.
During an ERASE SUSPEND operation and after the ENTER EXTENDED MEMORY
BLOCK command is issued, a bus READ operation to the extended memory block will
output the extended memory block data. After the device enters extended memory
block mode, the EXIT EXTENDED MEMORY BLOCK command must be issued before
the ERASE operation can be resumed.
An ERASE SUSPEND command is ignored if it is written during a CHIP ERASE opera-
tion.
If the ERASE SUSPEND operation is aborted by performing a device reset or power-
down, data integrity cannot be ensured, and it is recommended that the suspended
blocks be erased again.
ERASE RESUME Command
The ERASE RESUME (30h) command restarts the program/erase controller after an
ERASE SUSPEND operation.
The device must be in read array mode before the ERASE RESUME command will be
accepted. An erase can be suspended and resumed more than once.
PDF: 09005aef84ecabef
m29dw_256g.pdf - Rev. A 10/12 EN
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