MBM29F160BE-55 FUJITSU [Fujitsu Component Limited.], MBM29F160BE-55 Datasheet - Page 21

• Manufacturer Part Number: MBM29F160BE-55
• Description: 16M (2M X 8/1M X 16) BIT
• Manufacturer: FUJITSU [Fujitsu Component Limited.]

DQ
Sector Erase Timer
DQ
Toggle Bit II
Notes: 1. Performing successive read operations from any address will cause DQ
Program
Erase
Erase Suspend Read
(Erase Suspended Sector)
(Note 1)
Erase-Suspend Program
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
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 Table 9: 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 DQ
DQ
Program operation is in progress.
For example, DQ
(DQ
3
2
2
6
2
2. Reading the byte address being programmed while in the erase-suspend program mode will indicate
to toggle. When the device is in the erase-suspended-program mode, successive reads from the byte
is different from DQ
toggles while DQ
MBM29F160TE
logic “1” at the DQ
toggle.
5
failure condition may also appear if a user tries to program a non blank location without erasing. In this
Mode
2
and DQ
6
3
does not.) See also Table 10 and Figure 18.
prior to and following each subsequent sector erase command. If DQ
2
7
in that DQ
2
and DQ
6
bit. However, successive reads from the erase-suspended sector will cause DQ
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
toggles only when the standard program or Erase, or Erase Suspend
Table 10
-55/-70/-90
DQ
DQ
DQ
0
1
7
7
7
Toggle Bit Status
2
to toggle during the Embedded Erase Algorithm. If the
/MBM29F160BE
Toggle (Note 1)
Toggle
Toggle
DQ
1
3
3
6
2
is high (“1”) the internally controlled
is low (“0”), the device will accept
.
6
to toggle.
1 (Note 2)
-55/-70/-90
3
Toggle
Toggle
is high on the
DQ
1
2
3
3
may
will
2
to
5
21