MBM29LV400TC-55PF Meet Spansion Inc., MBM29LV400TC-55PF Datasheet - Page 21

• Manufacturer Part Number: MBM29LV400TC-55PF
• Description: Flash Memory Cmos 4m 512k ? 8/256k ? 16 Bit
• Manufacturer: Meet Spansion Inc.

20
MBM29LV400TC
(2) Fast Programming
(3) Extended Sector Protection
8. Write Operation Status
*1:Successive reads from the erasing or erase-suspend sector cause DQ
*2: Reading from non-erase suspend sector address indicates logic “1” at the DQ
In
Progress
Exceeded
Time
Limits
register. In this mode, the required bus cycle for programming is two cycles instead of four bus cycles in
standard program command. (Do not write erase command in this mode.) The read operation is also executed
after exiting this mode. To exit this mode, it is necessary to write Fast Mode Reset command into the command
register. (Refer to “8. Embedded Program
algorithm.) The V
During Fast Mode, the programming can be executed with two bus cycles operation. The Embedded Program
Algorithm is executed by writing program set-up command (A0h) and data write cycles (PA/PD). (Refer to
“8. Embedded Program
In addition to normal sector protection, the MBM29LV400TC/BC has Extended Sector Protection as extended
function. This function enable to protect sector by forcing V
Unlike conventional procedure, it is not necessary to force V
RESET pin requires V
pin. With this condition, the operation is initiated by writing the set-up command (60h) into the command
register. Then, the sector addresses pins (A
be set to the sector to be protected (recommend to set V
sector protect command (60h). A sector is typically protected in 150 s. To verify programming of the
protection circuitry, the sector addresses pins (A
be set and write a command (40h). Following the command write, a logical “1” at device output DQ
produce for protected sector in the read operation. If the output data is logical “0”, please repeat to write
extended sector protect command (60h) again. To terminate the operation, it is necessary to set RESET pin
to V
IH
.
Embedded Program Algorithm
Embedded Erase Algorithm
Erase
Suspende
d Mode
Embedded Program Algorithm
Embedded Erase Algorithm
Erase
Suspende
d Mode
CC
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)
active current is required even CE = V
ID
Status
for sector protection in this mode. The extended sector protect requires V
TM
Algorithm for Fast Mode” in FLOW CHART Extended algorithm.)
-55/70/90
Hardware Sequence Flags
/MBM29LV400BC
TM
17
Algorithm for Fast Mode” in FLOW CHART Extended
, A
17
16
, A
, A
16
15
, A
, A
15
IL
14
, A
ID
for the other addresses pins), and write extended
IH
, A
on RESET pin and write a commnad sequence.
14
during Fast Mode.
ID
Data
DQ
DQ
DQ
DQ
DQ
13
, A
and control timing for control pins. The only
0
1
0
and A
13
7
7
7
7
7
and A
2
to toggle.
12
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Data
DQ
) and (A
12
1
) and (A
6
2
bit.
6
-55/70/90
, A
Data
DQ
6
, A
0
0
0
0
1
1
1
1
, A
5
1
, A
0
) = (0, 1, 0) should
0
Data
) = (0, 1, 0) should
DQ
0
1
0
0
0
1
0
3
ID
on RESET
Toggle*
Toggle
Data
DQ
N/A
N/A
1 *
0
1
1
will
2
2
1