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AM29LV640MH112RPCI 参数 Datasheet PDF下载

AM29LV640MH112RPCI图片预览
型号: AM29LV640MH112RPCI
PDF下载: 下载PDF文件 查看货源
内容描述: 64兆位(4M ×16位/ 8的M× 8位)的MirrorBit 3.0伏特,只有统一部门快闪记忆体与VersatileI / O控制 [64 Megabit (4 M x 16-Bit/8 M x 8-Bit) MirrorBit 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O Control]
分类和应用: 闪存内存集成电路
文件页数/大小: 62 页 / 1108 K
品牌: SPANSION [ SPANSION ]
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D A T A S H E E T  
After an erase-suspended program operation is com-  
Erase Suspend/Erase Resume  
Commands  
plete, the device returns to the erase-suspend-read  
mode. The system can determine the status of the  
program operation using the DQ7 or DQ6 status bits,  
just as in the standard word program operation.  
Refer to the Write Operation Status section for more  
information.  
The Erase Suspend command, B0h, allows the sys-  
tem to interrupt a sector erase operation and then read  
data from, or program data to, any sector not selected  
for erasure. This command is valid only during the sec-  
tor erase operation, including the 50 µs time-out pe-  
riod during the sector erase command sequence. The  
Erase Suspend command is ignored if written during  
the chip erase operation or Embedded Program  
algorithm.  
In the erase-suspend-read mode, the system can also  
issue the autoselect command sequence. Refer to the  
Autoselect Mode and Autoselect Command Sequence  
sections for details.  
To resume the sector erase operation, the system  
must write the Erase Resume command. Further  
writes of the Resume command are ignored. Another  
Erase Suspend command can be written after the chip  
has resumed erasing.  
When the Erase Suspend command is written during  
the sector erase operation, the device requires a max-  
imum of 20 (typical 5 µs) to suspend the erase opera-  
tion. However, when the Erase Suspend command is  
written during the sector erase time-out, the device im-  
mediately terminates the time-out period and sus-  
pends the erase operation.  
Note: During an erase operation, this flash device per-  
forms multiple internal operations which are invisible  
to the system. When an erase operation is suspended,  
any of the internal operations that were not fully com-  
pleted must be restarted. As such, if this flash device  
is continually issued suspend/resume commands in  
rapid succession, erase progress will be impeded as a  
function of the number of suspends. The result will be  
a longer cumulative erase time than without suspends.  
Note that the additional suspends do not affect device  
reliability or future performance. In most systems rapid  
erase/suspend activity occurs only briefly. In such  
cases, erase performance will not be significantly im-  
pacted.  
After the erase operation has been suspended, the  
device enters the erase-suspend-read mode. The sys-  
tem can read data from or program data to any sector  
not selected for erasure. (The device “erase sus-  
pends” all sectors selected for erasure.) Reading at  
any address within erase-suspended sectors pro-  
duces status information on DQ7–DQ0. The system  
can use DQ7, or DQ6 and DQ2 together, to determine  
if a sector is actively erasing or is erase-suspended.  
Refer to the Write Operation Status section for infor-  
mation on these status bits.  
32  
Am29LV640MH/L  
December 14, 2005