MBM29PL160TD-90PF Meet Spansion Inc., MBM29PL160TD-90PF Datasheet - Page 25

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

DQ
Exceeded Timing Limits
DQ
Sector Erase Timer
DQ
Toggle Bit II
DQ
these conditions DQ
cycle was not successfully completed. Data Polling is the only operating function of the device under this
condition. The CE circuit will partially power down the device under these conditions. The OE and WE pins will
control the output disable functions as described in "MBM29PL160TD/BD User Bus Operation Tables (BYTE =
V
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.
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".
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
5
3
2
IH
5
and BYTE = V
2
6
2
will indicate if the program or erase time has exceeded the specified limits (internal pulse count). Under
to toggle. When the device is in the erase-suspended-program mode, successive reads from the byte
is different from DQ
toggles while DQ
5
failure condition may also appear if a user tries to program a non blank location without erasing. In this
2
toggles if this bit is read from an erasing sector.
2
2
IL
and DQ
can also be used to determine which sector is being erased. When the device is in the erase
)" in ■DEVICE BUS OPERATIONS.
5
will produce a “1”. This is a failure condition which indicates that the program or erase
6
3
does not.) See also "Toggle Bit Status Table" and "(12) DQ
prior to and following each subsequent sector erase command. If DQ
2
7
in that DQ
and DQ
6
can be used together to determine if the erase-suspend-read mode is in progress.
6
, can be used to determine whether the device is in the Embedded Erase
6
never stops toggling. Once the device has exceeded timing limits, the DQ
6
Retired Product DS05-20872-4E_July 31, 2007
toggles only when the standard program or Erase, or Erase Suspend
2
to toggle during the Embedded Erase Algorithm. If the
MBM29PL160TD/BD
3
3
2
is high (“1”) the internally controlled
is low (“0”), the device will accept
.
2
vs. DQ
6
" in ■TIMING
3
is high on the
-75/90
3
may
3
will
5
25