MBM29F033C-12 FUJITSU [Fujitsu Component Limited.], MBM29F033C-12 Datasheet - Page 18

• Manufacturer Part Number: MBM29F033C-12
• Description: 32M (4M X 8) BIT
• Manufacturer: FUJITSU [Fujitsu Component Limited.]

18
MBM29F033C
Erase Suspend
The Erase Suspend command allows the user to interrupt a Sector Erase operation and then perform data reads
from or programs to a sector not being erased. This 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
command during the Sector Erase time-out results in immediate termination of the time-out period and
suspension of the erase operation.
Any other command written during the Erase Suspend mode will be ignored except the Erase Resume command.
Writing the Erase Resume command 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 15 ms to suspend the erase operation. When the device has entered the erase-suspended mode, the RY/BY
output pin and the DQ
erasing sector for reading DQ
of the Erase Suspend 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
After entering the erase-suspend-read mode, the user can program the device by writing the appropriate
command sequence for Byte Program. This program mode is known as the erase-suspend-program mode.
Again, programming in this mode is the same as programming in the regular Byte 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
the erase-suspended program operation is detected by the RY/BY output pin, Data polling of DQ
Toggle Bit I (DQ
the byte program address while DQ
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.
6
) which is the same as the regular Byte Program operation. Note that DQ
7
bit will be at logic “1”, and DQ
-70/-90/-12
6
and DQ
6
can be read from any address.
7
to determine if the erase operation has been suspended. Further writes
6
will stop toggling. The user must use the address of the
2
to toggle. (See the section on DQ
TM
Algorithm. Writting the Erase Suspend
2
to toggle. The end of
7
must be read from
2
.)
7
, or by the