MBM29DL800TA-70 Meet Spansion Inc., MBM29DL800TA-70 Datasheet - Page 23

• Manufacturer Part Number: MBM29DL800TA-70
• Description: Flash Memory Cmos 8m 1m ? 8 / 512k ? 16 Bit
• Manufacturer: Meet Spansion Inc.

Extended Command
When the Erase Suspend command is written during the Sector Erase operation, the device will take a maximum
of 20 µs to suspend the erase operation. When the devices have entered the erase-suspended mode, the RY/
BY output pin will be at Hi-Z and the DQ
the address of the erasing sector for reading DQ
suspended. Further writes of the Erase Suspend command are ignored.
When the erase operation has been suspended, the devices default to the erase-suspend-read mode. Reading
data in this mode is the same as reading from the standard read mode except that the data must be read from
sectors that have not been erase-suspended. Successively reading from the erase-suspended sector while the
device is in the erase-suspend-read mode will cause DQ
After entering the erase-suspend-read mode, the user can program the device by writing the appropriate
command sequence for Program. This program mode is known as the erase-suspend-program mode. Again,
programming in this mode is the same as programming in the regular Program mode except that the data must
be programmed to sectors that are not erase-suspended. Successively reading from the erase-suspended sector
while the devices are in the erase-suspend-program mode will cause DQ
suspended Program operation is detected by the RY/BY output pin, Data polling of DQ
(DQ
while DQ
To resume the operation of Sector Erase, the Resume command (30h) should be written to the bank being erase
suspended. Any further writes of the Resume command at this point will be ignored. Another Erase Suspend
command can be written after the chip has resumed erasing.
(1) Fast Mode
(2) Fast Programming
(3) Extended Sector Protection
MBM29DL800TA/BA has Fast Mode function. This mode dispenses with the initial two unclock cycles
required in the standard program command sequence by writing Fast Mode command into the command
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. The first cycle must contain the bank address. (Refer to “(8) Embedded Program
Fast Mode” in ■FLOW CHART Extended algorithm.) The V
Fast Mode.
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 MBM29DL800TA/BA 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 250 µs. To verify programming of the
protection circuitry, the sector addresses pins (A
should be set and write a command (40h). Following the command write, a logical “1” at device output DQ
will 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
6
) which is the same as the regular Program operation. Note that DQ
IH
6
.
can be read from any address within bank being erase-suspended.
MB M29DL800TA
ID
for sector protection in this mode. The extended sector protect requires V
TM
Algorithm for Fast Mode” in ■FLOW CHART Extended algorithm.)
Retired Product DS05-20860-7E_August 6, 2007
7
bit will be at logic “1”, and DQ
18
, A
6
and DQ
17
18
, A
, A
16
17
, A
2
7
, A
to toggle. (See the section on DQ
-70/90
to determine if the erase operation has been
15
IL
16
, A
for the other addresses pins), and write extended
ID
CC
, A
on RESET pin and write a commnad sequence.
14
ID
active current is required even CE = V
, A
15
/MBM29DL800BA
and control timing for control pins. The only
, A
13
14
and A
7
, A
must be read from the Program address
6
will stop toggling. The user must use
2
13
to toggle. The end of the erase-
12
and A
) and (A
12
) and (A
6
, A
7
1
or by the Toggle Bit I
, A
6
0
, A
2
) = (0, 1, 0) should
.)
TM
1
, A
Algorithm for
ID
0
) = (0, 1, 0)
on RESET
IH
-70/90
during
0
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