MBM29PL3200BE Fujitsu Microelectronics, Inc., MBM29PL3200BE Datasheet - Page 24

• Manufacturer Part Number: MBM29PL3200BE
• Description: Page Mode Flash Memory 32 M 2 M X 16/1 M X 32 Bit
• Manufacturer: Fujitsu Microelectronics, Inc.

MBM29PL3200TE/BE
70/90
Erase Suspend/Resume
The Erase Suspend/Resume command allows the user to interrupt a Sector Erase operation and then perform
data reads from or programs to a sector not being erased. Erase suspend command is applicable ONLY during
the Sector Erase operation, which includes the time-out period for sector erase. The Erase Suspend command
will be ignored if written during the Chip Erase operation or Embedded Program Algorithm. Writing the Erase
Suspend command (B0h) during the Sector Erase time-out results in immediate termination of the time-out
period and suspension of the erase operation.
Writing the Erase Resume command (30h) resumes the erase operation. The addresses are “DON’T CAREs”
when writing the Erase Suspend or Erase Resume command.
When the Erase Suspend command is written during the Sector Erase operation, the device will take a maximum
of “t
” to suspend the erase operation. When the device has entered the erase-suspended mode, the DQ
bit
SPD
7
will be at logic “1” and DQ
will stop toggling. The user must use the address of the erasing sector for reading
6
DQ
and DQ
to determine if the erase operation has been suspended. Further writes of the Erase Suspend
6
7
command are ignored.
When the erase operation has been suspended, the device defaults to the erase-suspend-read mode. Reading
data in this mode is the same as reading from the standard read mode except that the data must be read from
sectors that have not been erase-suspended. Successively reading from the erase-suspended sector while the
device is in the erase-suspend-read mode will cause DQ
to toggle. (See the section on DQ
.)
2
2
After entering the erase-suspend-read mode, the user can program the device by writing the appropriate com-
mand sequence for Program. This program mode will become the erase-suspend-program mode. Again, pro-
gramming in this mode is the same as programming in the regular Program mode except that the data must be
programmed to sectors that are not erase-suspended. Successively reading from the erase-suspended sector
while the device is in the erase-suspend-program mode will cause DQ
to toggle. The end of the erase-suspended
2
Program operation is detected by the Data polling of DQ
or by the Toggle Bit I (DQ
), which is the same as the
7
6
regular Program operation. Note that DQ
must be read from the Program address while DQ
can be read from
7
6
any address.
To resume the operation of Sector Erase, the Resume command (30h) should be written. Any further writes of
the Resume command at this point will be ignored. Another Erase Suspend command can be written after the
chip has resumed erasing.
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