參數(shù)資料
型號(hào)： MBM29LV652UE-90
廠商： Fujitsu Limited
英文描述： 64M (4M X 16) BIT
中文描述： 64M號(hào)（4米× 16）位
文件頁(yè)數(shù)： 28/58頁(yè)
文件大?。?/td> 571K
代理商： MBM29LV652UE-90
MBM29LV652UE-
90/12
28
DQ
3
Sector Erase Timer
After the completion of the initial sector erase command sequence the sector erase time-out will begin. DQ
3
will
remain low until the time-out is complete. Data Polling and Toggle Bit are valid after the initial sector erase
command sequence.
If Data Polling or the Toggle Bit I indicates the device has been written with a valid erase command, DQ
3
may
be used to determine if the sector erase timer window is still open. If DQ
3
is high (“1”) the internally controlled
erase cycle has begun; attempts to write subsequent commands to the device will be ignored until the erase
operation is completed as indicated by Data Polling or Toggle Bit I. If DQ
3
is low (“0”), the device will accept
additional sector erase commands. To insure the command has been accepted, the system software should
check the status of DQ
3
prior to and following each subsequent Sector Erase command. If DQ
3
were high on
the second status check, the command may not have been accepted.
See Table 8 : Hardware Sequence Flags.
DQ
2
Toggle Bit II
This toggle bit II, along with DQ
6
, can be used to determine whether the devices are in the Embedded Erase
Algorithm or in Erase Suspend.
Successive reads from the erasing sector will cause DQ
2
to toggle during the Embedded Erase Algorithm. If the
devices are in the erase-suspended-read mode, successive reads from the erase-suspended sector will cause
DQ
2
to toggle. When the devices are in the erase-suspended-program mode, successive reads from the byte
address of the non-erase suspended sector will indicate a logic “1” at the DQ
2
bit.
DQ
6
is different from DQ
2
in that DQ
6
toggles only when the standard program or Erase, or Erase Suspend
Program operation is in progress. The behavior of these two status bits, along with that of DQ
7
, is summarized
as follows:
For example, DQ
2
and DQ
6
can be used together to determine if the erase-suspend-read mode is in progress.
(DQ
2
toggles while DQ
6
does not.) See also Table 9 and Figure 11.
Furthermore, DQ
2
can also be used to determine which sector is being erased. When the device is in the erase
mode, DQ
2
toggles if this bit is read from an erasing sector.
*: Successive reads from the erasing or erase-suspend sector will cause DQ
2
to toggle. Reading from non-erase
suspend sector address will indicate logic “1” at the DQ
2
bit.
Table 9 Toggle Bit Status
Mode
DQ
7
DQ
6
DQ
2
Program
DQ
7
Toggle
1
Erase
0
Toggle
Toggle *
Erase-Suspend Read
(Erase-Suspended Sector)
1
1
Toggle
Erase-Suspend Program
DQ
7
Toggle
1 *
相關(guān)PDF資料
PDF描述
MBM29LV652UE90PBT 64M (4M X 16) BIT
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MBM29LV652UE90PBT 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:64M (4M X 16) BIT
MBM29LV800BA 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8M (1M X 8/512K X 16) BIT
MBM29LV800BA-12 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8M (1M X 8/512K X 16) BIT
MBM29LV800BA-70 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8M (1M X 8/512K X 16) BIT
MBM29LV800BA-90 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8M (1M X 8/512K X 16) BIT
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