MBM29PL3200BE Fujitsu Microelectronics, Inc., MBM29PL3200BE Datasheet - Page 29

• Manufacturer Part Number: MBM29PL3200BE
• Description: Page Mode Flash Memory 32 M 2 M X 16/1 M X 32 Bit
• Manufacturer: Fujitsu Microelectronics, 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 only operating function of device under this condition. The
CE circuit will partially power down the device under these conditions (to approximately 2 mA). The OE and WE
pins will control the output disable functions as described in Tables 2 and 3.
The DQ
this case the device locks out and never completes the Embedded Algorithm operation. Hence, the system never
reads 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 the command sequence.
After completion of the initial sector erase command sequence, sector erase time-out will begin. DQ
low until the time-out is completed. Data Polling and Toggle Bit are valid after the initial sector erase command
sequence.
If Data Polling or the Toggle Bit I indicates that the device has been written with a valid erase command, DQ
may be used to determine whether the sector erase timer window is still open. If DQ
controlled 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
accept additional sector erase commands. To insure the command has been accepted, the system software
should check the status of DQ
on the second status check, the command may not have been accepted.
See Table 10 : Hardware Sequence Flags.
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 the DQ
DQ
Program operation is in progress. The behavior of these two status bits, along with that of DQ
as follows :
For example, DQ
progress. (DQ
Furthermore, DQ
mode, DQ
5
3
2
5
2
6
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
5
failure condition may also appear if a user tries to program a non-blank location without pre-erase. In
2
toggles if this bit is read from an erasing sector.
2
toggles while DQ
2
2
can also be used to determine which sector is being erased. When the device is in the erase
and DQ
5
will produce a “1”. This is a failure condition which indicates that the program or erase
7
bit and DQ
2
in that DQ
6
can be used together to determine whether the erase-suspend-read mode is in
3
prior to and following each subsequent Sector Erase command. If DQ
6
6
, can be used to determine whether the device is in the Embedded Erase
does not.) See also Table 11 and Figure 11.
6
never stops toggling. Once the device has exceeded timing limits, the DQ
6
toggles only when the standard program or Erase, or Erase Suspend
2
MBM29PL3200TE/BE
to toggle during the Embedded Erase Algorithm. If the
2
bit.
3
3
is low (“0”), the device will
is high (“1”), the internally
7
, is summarized
3
will remain
3
is high
70/90
5
3
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