MBM29PL65LM Fujitsu Media Devices, MBM29PL65LM Datasheet - Page 21

• Manufacturer Part Number: MBM29PL65LM
• Description: FLASH MEMORY CMOS 64 M (4M X 16) BIT MirrorFlashTM
• Manufacturer: Fujitsu Media Devices

Erase Suspend/Resume Command
Fast Mode Set/Reset Command
starts first occurs within the “t
erase timer window is still open, see section DQ
or Erase Suspend during this time-out period will reset the device to the read mode, ignoring the previous
command string. Resetting the device once execution has begun may corrupt the data in the sector. In that case
restart the erase on those sectors and allow them to complete. Refer to "Write Operation Status" section for
Sector Erase Timer operation. Loading the sector erase buffer may be done in any sequence and with any
number of sectors.
Sector erase does not require the user to program prior to erase. The device automatically programs all memory
locations in the sector(s) to be erased prior to electrical erase (Preprogram function). When erasing a sector or
sectors the remaining unselected sectors are not affected. 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
The sector erase begins after the “t
last sector erase command pulse and terminates when the data on DQ
to the read mode. See "Write Operation Status" section. Data polling and Toggle Bit must be performed at an
address within any of the sectors being erased.
Multiple Sector Erase Time; [Sector Erase Time + Sector Program Time (Preprogramming)] Number of Sector
Erase.
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 Sectore 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 a maximum
of “t
BY output pin will be at High-Z and the DQ
the address of the erasing sector for reading DQ
pended. Further writes of the Erase Suspend command are ignored.
When the erase operation is suspended, the device defaults 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 causes 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 is ignored. Another Erase Suspend command is written after the chip resumes
erasing.
Do not issuing program command after entering erase-suspend-read mode.
Fast Mode function dispenses with the initial two unlock cycles required in the standard program command
sequence 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. The read operation is also
executed after exiting this mode. During the Fast mode, do not write any commands other than the Fast program/
Fast mode reset command. To exit this mode, write Fast Mode Reset command into the command register.
Refer to "Embedded Program Algorithm for Fast Mode". The V
Fast Mode.
SPD
” to suspend the erase operation. When the devices have entered the erase-suspended mode, the RY/
TOW
” time-out window the timer is reset. (Monitor DQ
TOW
” time out from the rising edge of CE or WE whichever starts first for the
7
bit will be at logic “1” and DQ
2
3
, "Sector Erase Timer".) Any command other than Sector Erase
to toggle. See the section on DQ
6
and DQ
7
to determine if the erase operation has been sus-
CC
active current is required even CE = V
MBM29PL65LM
7
6
is “1” at which time the device returns
7
will stop toggling. The user must use
(Data Polling), or DQ
2
.
3
to determine if the sector
6
(Toggle Bit).
IH
-90/10
during
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