MBM29DL400BC Fujitsu Media Devices, MBM29DL400BC Datasheet - Page 22

• Manufacturer Part Number: MBM29DL400BC
• Description: 4M (512K X 8/256K X 16) BIT
• Manufacturer: Fujitsu Media Devices

22
MBM29DL400TC
Write Operation Status
Notes: 1. Successive reads from the erasing or erase-suspend sector will cause DQ
In Progress
Exceeded
Time Limits
Detailed in Table 9 are all the status flags that can determine the status of the bank for the current mode operation.
The read operation from the bank where is not operate Embedded Algorithm returns a data of memory cell.
These bits offer a method for determining whether a Embedded Algorithm is completed properly. The information
on DQ
DQ
This allows the user to determine which sectors are erasing and which are not.
The status flag is not output from bank (non-busy bank) not executing Embedded Algorithm. For example, there
is bank (busy bank) which is now executing Embedded Algorithm. When the read sequence is [1] <busy bank>,
[2] <non-busy bank>, [3] <busy bank>, the DQ
memory cell is outputted. In the erase-suspend read mode with the same read sequence, DQ
in the [1] and [3].
In the erase suspend read mode, DQ
outputted.
2
2. DQ
3. DQ
bit will toggle. However, DQ
2
is address sensitive. This means that if an address from an erasing sector is consectively read, then the
non-erase suspend sector address will indicate logic “1” at the DQ
Embedded Program Algorithm
Embedded Erase Algorithm
Erase
Suspended
Mode
Embedded Program Algorithm
Embedded Erase Algorithm
Erase
Suspended
Mode
0
4
and DQ
is Fujitsu internal use only.
1
are reserve pins for future use.
Erase Suspend Read
(Erase Suspended Sector)
Erase Suspend Read
(Non-Erase Suspended Sector)
Erase Suspend Program
(Non-Erase Suspended Sector)
Erase Suspend Program
(Non-Erase Suspended Sector)
Status
-55/-70/-90/-12
2
will not toggle if an address from a non-erasing sector is consectively read.
Table 9
2
is toggled in the [1] and [3]. In case of [2], the data of memory cell is
Hardware Sequence Flags
6
is toggling in the case of [1] and [3]. In case of [2], the data of
/MBM29DL400BC
Data
DQ
DQ
DQ
DQ
DQ
0
1
0
2
bit.
7
7
7
7
7
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Data
DQ
1
2
to toggle. Reading from
6
-55/-70/-90/-12
Data Data
DQ
0
0
0
0
1
1
1
6
5
will not be toggled
DQ
0
1
0
0
0
1
0
3
(Note 1)
(Note 1)
Toggle
Toggle
Data
DQ
N/A
N/A
1
1
1
2