MBM29LV160TE70TN Meet Spansion Inc., MBM29LV160TE70TN Datasheet - Page 26

• Manufacturer Part Number: MBM29LV160TE70TN
• Description: Flash Memory Cmos 16m 2m ? 8/1m ? 16 Bit
• Manufacturer: Meet Spansion Inc.

26
MBM29LV160TE
Sector Erase Timer
Toggle Bit II
*1 : Performing successive read operations from any address will cause DQ
*2 : Reading the byte address being programmed while in the erase-suspend program mode will indicate logic “1”
Program
Erase
Erase Suspend Read
(Erase Suspended Sector) *
Erase-Suspend Program
The DQ
case the device locks out and never completes the Embedded Algorithm operation. Hence, the system never
reads a valid data on DQ
bit will indicate a “1.” Please note that this is not a device failure condition since the device was incorrectly used.
If this occurs, reset the device with command sequence.
• DQ
After the completion of the initial sector erase command sequence the sector erase time-out will begin. DQ
remain low until the time-out is complete. Data Polling and Toggle Bit I are valid after the initial sector erase
command sequence.
If Data Polling or the Toggle Bit I indicates the device has been written with a valid erase command, DQ
be used to determine if the sector erase timer window is still open. If DQ
erase cycle has begun; attempts to write subsequent commands to the device will be ignored until the erase
operation is completed as indicated by Data Polling or Toggle Bit I. If DQ
additional sector erase commands. To insure the command has been accepted, the system software should
check the status of DQ
second status check, the command may not have been accepted.
See “Hardware Sequence Flags” Table.
• DQ
This Toggle Bit II, along with DQ
Algorithm or in Erase Suspend.
Successive reads from the erasing sector will cause DQ
device is in the erase-suspended-read mode, successive reads from the erase-suspended sector will cause
DQ
address of the non-erase suspended sector will indicate a logic “1” at DQ
DQ
Program operation is in progress.
For example, DQ
(DQ
DIAGRAM”.
Furthermore, DQ
mode, DQ
at the DQ
2
6
2
to toggle. When the device is in the erase-suspended-program mode, successive reads from the byte
is different from DQ
toggles while DQ
3
2
5
failure condition may also appear if a user tries to program a non blank location without erasing. In this
2
2
toggles if this bit is read from an erasing sector.
Mode
bit. However, successive reads from the erase-suspended sector will cause DQ
2
2
and DQ
can also be used to determine which sector is being erased. When the device is in the erase
6
3
does not.) See also “Toggle Bit Status” Table and “DQ
prior to and following each subsequent sector erase command. If DQ
7
2
1
6
and DQ
in that DQ
can be used together to determine if the erase-suspend-read mode is in progress.
70/90
6
6
, can be used to determine whether the device is in the Embedded Erase
never stops toggling. Once the device has exceeded timing limits, the DQ
Retired Product DS05-20883-7E_July 31, 2007
6
toggles only when the standard program or Erase, or Erase Suspend
/MBM29LV160BE
DQ
DQ
DQ
Toggle Bit Status
0
1
7
7
7
2
to toggle during the Embedded Erase Algorithm. If the
Toggle *
Toggle
Toggle
DQ
1
6
3
2
6
.
is high (“1”) the internally controlled
3
to toggle.
1
is low (“0”), the device will accept
70/90
2
vs. DQ
6
” in “■TIMING
2
to toggle.
Toggle
Toggle
3
DQ
1 *
is high on the
1
2
2
3
3
may
will
5