MBM29LV080A Fujitsu Media Devices, MBM29LV080A Datasheet - Page 19

• Manufacturer Part Number: MBM29LV080A
• Description: 8M (1M x 8) BIT
• Manufacturer: Fujitsu Media Devices

DQ
Exceeded Timing Limits
DQ
Sector Erase Timer
DQ
Toggle Bit II
DQ
these conditions DQ
cycle was not successfully completed. Data Polling DQ
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 Table 2.
The DQ
case the device locks out and never completes the Embedded Algorithm operation. Hence, the system never
reads a valid data on DQ
DQ
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
will remain low until the time-out is complete. Data Polling and Toggle Bit 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 Table 8: Hardware Sequence Flags.
This Toggle Bit II, along with DQ
Algorithm or in Erase Suspend.
Successive reads from the erasing sector will cause DQ
devices are 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.
For example, DQ
while DQ
Furthermore, DQ
erase mode, DQ
5
3
2
5
5
2
6
bit will indicate a “1” Please note that this is not a device failure condition since the device was incorrectly
will indicate if the program or erase time has exceeded the specified limits (internal pulse count). Under
to toggle. When the devices are 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 erasing. In this
6
does not.) See also above Table 9 and Figure 16.
2
2
2
toggles if this bit is read from the erasing sector.
and DQ
can also be used to determine which sector is being erased. When the devices are in the
5
will produce a “1”. This is a failure condition which indicates that the program or erase
3
prior to and following each subsequent sector erase command. If DQ
2
7
in that DQ
6
bit and DQ
can be used together to determine the erase-suspend-read mode. (DQ
6
, can be used to determine whether the devices are in the Embedded Erase
6
6
toggles only when the standard program or Erase, or Erase Suspend
never stops toggling. Once the device has exceeded timing limits, the
7
2
, DQ
to toggle during the Embedded Erase Algorithm. If the
6
is the only operating function of the device under
MBM29LV080A
3
is high (“1”) the internally controlled
3
is low (“0”), the device will accept
2
bit.
3
were high on the
-70/-90/-12
2
toggles
3
may
3
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