MBM29PL160TD-90PF Meet Spansion Inc., MBM29PL160TD-90PF Datasheet - Page 22

• Manufacturer Part Number: MBM29PL160TD-90PF
• Description: Page Mode Flash Memory Cmos 16m 2m ? 8/1m ? 16 Bit
• Manufacturer: Meet Spansion Inc.

MBM29PL160TD/BD
-75/90
controls or timings during these operations. (See "(5) AC Waveforms for Chip/Sector Erase Operations" in
■TIMING DIAGRAM.)
The automatic sector erase begins after the 50 µs time out from the rising edge of the WE or OE pulse for the
last sector erase command pulse and terminates when the data on DQ
is “1” (See “Write Operation Status”
7
section) at which time the device returns to the read mode. Data polling must be performed at an address within
any of the sectors being erased. Multiple Sector Erase Time; [Sector Program Time (Preprogramming) + Sector
Erase Time] × Number of Sector Erase.
Algorithm" in ■FLOW CHART illustrates the Embedded Erase
"(2) Embedded Erase
TM
TM
Algorithm using typical
command strings and bus operations.
Erase Suspend
The Erase Suspend command allows the user to interrupt a Sector Erase operation and then perform data reads
from or program 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 Algorithm. Writting the Erase Suspend command
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 resumes the erase operation. The addresses are “DON’T CARES” when
writing the Erase Suspend or Erase Resume commands.
When the Erase Suspend command is written during the Sector Erase operation, the device will take a maximum
of 20 µs to suspend the erase operation. When the devices have entered the erase-suspended mode, the DQ
7
bit 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
command sequence for 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 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 devices are in the erase-suspend-program mode will cause DQ
to toggle. The end of the erase-
2
suspended Program operation is detected by the Toggle Bit (DQ
) which is the same as the regular Program
6
operation. Note that DQ
must be read from the Program address while DQ
can be read from any address.
7
6
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.
22
Retired Product DS05-20872-4E_July 31, 2007