MBM29DL640E Fujitsu Microelectronics, Inc., MBM29DL640E Datasheet - Page 33

• Manufacturer Part Number: MBM29DL640E
• Description: Flash Memory 64 M 8 M X 8/4 M X 16 Bit Dual Operation
• Manufacturer: Fujitsu Microelectronics, Inc.

Write Operation Status
*1: Successive reads from the erasing or erase-suspend sector will cause DQ
*2: Reading from non-erase suspend sector address will indicate logic “1” at the DQ
Notes: 1. DQ
In Progress
Exceeded
Time Limits
method because other than the Hidden ROM mode, it is the same as the sector group protect previously
mentioned. Refer to “Function Explanation Secor Group Protection” for details of the sector group protect setting.
Take note that other sector groups will be affected if an address other than those for the Hidden ROM area is
selected for the sector group address, so please be careful. Pay close attention that once it is protected, protection
CANNOT BE CANCELLED.
Detailed in Table 12 are all the status flags which can determine the status of the bank for the current mode
operation. The read operation from the bank which doesn’t operate Embedded Algorithm returns data of memory
cells. These bits offer a method for determining whether an Embedded Algorithm is properly completed. The
information on DQ
read, the DQ
read. This allows users to determine which sectors are in erase and which are not.
The status flag is not output from banks (non-busy banks) which do not execute Embedded Algorithms. For
example, a bank (busy bank) is executing an Embedded Algorithm. When the read sequence is [1] busy bank
of memory cells are output. In the erase-suspend read mode with the same read sequence, DQ
toggled in [1] and [3].
In the erase suspend read mode, DQ
, [2]
2. DQ
non-busy bank
0
4
Embedded Program Algorithm
Embedded Erase Algorithm
Program
Suspended
Mode
Erase
Suspended
Mode
Embedded Program Algorithm
Embedded Erase Algorithm
Erase
Suspended
Mode
and DQ
is limited to Fujitsu internal use.
2
bit will toggle. However, DQ
2
is address-sensitive. This means that if an address from an erasing sector is consecutively
1
are reserve pins for future use.
Program Suspend Read
Program Suspend Read
tor)
Erase Suspend Read
Erase Suspend Read
Erase Suspend Program
Erase Suspend Program
Status
(Program Suspended Sector)
(Non-Program Suspended Sec-
(Erase Suspended Sector)
(Non-Erase Suspended Sector)
(Non-Erase Suspended Sector)
(Non-Erase Suspended Sector)
, [3]
busy bank
Table 12 Hardware Sequence Flags
2
is toggled in [1] and [3]. In case of [2], the data of memory cell is output.
2
will not toggle if an address from a non-erasing sector is consecutively
, the DQ
6
toggles in the case of [1] and [3]. In case of [2], the data
Data
Data
Data
DQ
DQ
DQ
DQ
DQ
0
1
0
7
7
7
7
7
MBM29DL640E
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Data
Data
Data
DQ
1
2
6
to toggle.
2
bit.
Data
Data
Data
DQ
0
0
0
0
1
1
1
5
Data
Data
Data
DQ
0
1
0
0
0
1
0
3
6
Toggle *
will not be
Toggle
80/90/12
Data
Data
Data
DQ
N/A
N/A
1 *
1
1
2
2
1
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