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參數(shù)資料
| 型號： | MBM29F002SB |
| 廠商： | Fujitsu Limited |
| 英文描述： | 2M (256K ×8) Bit Flash Memory( 單5V 電源電壓256K ×8位閃速存儲器) |
| 中文描述： | 200萬（256K × 8）位快閃記憶體（單5V的電源電壓256K × 8位閃速存儲器） |
| 文件頁數(shù)： | 17/52頁 |
| 文件大?。?/td> | 591K |
| 代理商： | MBM29F002SB |
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17
MBM29F002T/002B/002ST/002SB
-70/-90/-12
The automatic erase begins on the rising edge of the last WE pulse in the command sequence and terminates
when the data on DQ
7
is “1” (see Write Operation Status section) at which time the device returns to read the
mode.
Figure 15 illustrates the Embedded Erase Algorithm using typical command strings and bus operations.
Sector Erase
Sector erase is a six bus cycle operation. There are two “unlock” write cycles. These are followed by writing the
“set-up” command. Two more “unlock” write cycles are then followed by the sector erase command. The sector
address (any address location within the desired sector) is latched on the falling edge of WE, while the command
(Data=30H) is latched on the rising edge of WE. After time-out of 50
μ
s from the rising edge of the last sector
erase command, the sector erase operation will begin.
Multiple sectors may be erased concurrently by writing the six bus cycle operations on Table 7. This sequence
is followed with writes of the Sector Erase command to addresses in other sectors desired to be concurrently
erased. The time between writes must be less than 50
μ
s, otherwise that command will not be accepted and
erasure will start. It is recommended that processor interrupts be disabled during this time to guarantee this
condition. The interrupts can be re-enabled after the last Sector Erase command is written. A time-out of 50
μ
s
from the rising edge of the last WE will initiate the execution of the Sector Erase command(s). If another falling
edge of the WE occurs within the 50
μ
s time-out window the timer is reset (Monitor DQ
3
to determine if the sector
erase timer window is still open, see section DQ
3
, Sector Erase Timer). Any command other than Sector Erase
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 will corrupt the data in that sector. In that
case, restart the erase on those sectors and allow them to complete. (Refer to the 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 (0 to 6).
Sector erase does not require the user to program the device prior to erase. The device automatically programs
all memory locations in the sector(s) to be erased prior to electrical erase. 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 automatic sector erase begins after the 50
μ
s time out from the rising edge of the WE pulse for the last
sector erase command pulse and terminates when the data on DQ
7
is “1” (see Write Operation Status section)
at which time the device returns to the read mode. Data polling must be performed at an address within any of
the sectors being erased.
Figure 15 illustrates the Embedded Erase
TM
Algorithm using typical command strings and bus operations.
Erase Suspend
The Erase Suspend command allows the user to interrupt a Sector Erase operation and then perform data reads
(not program) from a non-busy sector. This command is applicable ONLY during the Sector Erase operation and
will be ignored if written during the Chip Erase or Programming operation. The Erase Suspend command (B0H)
will be allowed only during the Sector Erase Operation that will include the sector erase time-out period after
the Sector Erase commands (30H). Writing this command during the time-out will result in immediate termination
of the time-out period. Any subsequent writes of the Sector Erase command will be taken as the Erase Resume
command. Note that any other commands during the time out will reset the device to read mode. The addresses
are don't-cares when writing the Erase Suspend or Erase Resume commands. When the Erase Suspend
command is written during a Sector Erase operation, the device will take a maximum of 15
μ
s to suspend the
erase operation. When the device has entered the erase-suspended mode, the DQ
7
bit will be at logic “1”, and
DQ
6
will stop toggling. The user must use the address of the erasing sector for reading DQ
6
and DQ
7
to determine
if the erase operation has been suspended. Further writes of the Erase Suspend command are ignored.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MBM29F002T-90PD# | 制造商:FUJITSU 功能描述: |
| MBM29F002TC | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2M (256K X 8) BIT |
| MBM29F002TC-55 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2M (256K X 8) BIT |
| MBM29F002TC-70 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2M (256K X 8) BIT |
| MBM29F002TC-90 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2M (256K X 8) BIT |
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