MBM29LV160TM-BM90 Meet Spansion Inc., MBM29LV160TM-BM90 Datasheet - Page 23

• Manufacturer Part Number: MBM29LV160TM-BM90
• Description: Flash Memory Cmos 16 M 2m ? 8/1m ? 16 Bit Mirrorflashtm*
• Manufacturer: Meet Spansion Inc.

Erase Suspend/Resume
Fast Mode Set/Reset
“DQ
In that case, restart the erase on those sectors and allow them to complete (refer to “Write Operation Status”).
Loading the sector erase buffer may be done in any sequence and with any number of sectors (0 to 34).
Sector erase does not require the user to program the devices prior to erase. The devices automatically program
all memory locations in the sector(s) to be erased prior to electrical erase using the Embedded Erase Algorithm.
When erasing a sector, the remaining unselected sectors remain unaffected. The system is not required to
provide any controls or timings during these operations.
The system can determine the status of the erase operation by using DQ
RY/BY
The sector erase begins after the “t
the last sector erase command pulse and completes when the data on DQ
at which the devices return to the read mode. Data polling and Toggle Bit must be performed at an address
within any of the sectors being erased.
The Erase Suspend command allows the user to interrupt Sector Erase operation and then perform read to a
sector not being erased. This command is applicable ONLY during the Sector Erase operation within the time-
out period for sector erase. Writting the Erase Suspend command (B0h) during the Sector Erase time-out results
in immediate termination of the time-out period and suspension of the erase operation.
Writing the "Erase Resume" command (30h) resumes the erase operation.
When the "Erase Suspend" command is written during the Sector Erase operation, the device takes maximum
of “t
pin will be at Hi-Z and the DQ
of the erasing sector for reading DQ
writes of the Erase Suspend command are ignored.
When the erase operation is 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. Reading successively from the erase-suspended sector while the device
is in the erase-suspend-read mode will cause DQ
To resume the operation of Sector Erase, the Resume command (30h) should be written. 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.
Do not issuing program command after entering erase-suspend-read mode.
The device has Fast Mode function. It 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 consists of two cycles instead of four bus cycles in standard program
command. During the Fast mode, do not write any commands other than the Fast program/Fast mode reset
command. The read operation is also executed after exiting this mode. To exit from this mode, write Fast Mode
Reset command into the command register. (Refer to the “Embedded Program
■FLOW CHART.) The V
SPD
3
”, Sector Erase Timer). Resetting the devices once execution has begun will corrupt the data in the sector.
” to suspend the erase operation. When the devices enter the erase-suspended mode, the RY/BY output
.
CC
active current is required even CE = V
7
bit will be at logic “1” and DQ
TOW
6
and DQ
Retired Product DS05-20906-4E_July 31, 2007
” time-out from the rising edge of CE or WE whichever happens first for
7
to determine if the erase operation has been suspended. Further
2
to toggle. see the section on DQ
6
will stop toggling. The user must use the address
MBM29LV160TM/BM
IH
during Fast Mode.
7
is “1” (see “Write Operation Status”),
7
(Data Polling), DQ
TM
Algorithm for Fast Mode” in
2
.
6
(Toggle Bit) or
90
23