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ES29DS800E-90RTG 参数 Datasheet PDF下载

ES29DS800E-90RTG图片预览
型号: ES29DS800E-90RTG
PDF下载: 下载PDF文件 查看货源
内容描述: 的8Mbit ( 1M ×8 / 512K ×16 )的CMOS 3.0伏只,引导扇区闪存 [8Mbit(1M x 8/512K x 16) CMOS 3.0 Volt-only, Boot Sector Flash Memory]
分类和应用: 闪存
文件页数/大小: 50 页 / 680 K
品牌: EXCELSEMI [ EXCEL SEMICONDUCTOR INC. ]
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Excel Semiconductor inc.  
sequence should be reinitiated once the device has  
returned to reading array data, to ensure data integ-  
rity.  
After an erase-suspended program operation is  
complete, the device returns to the erase-suspend-  
read mode. The system can determine the status for  
the program operation using the DQ7 or DQ6 status  
bits, just as in the standard Byte Program operation.  
Refer to the Write Operation Status section for more  
information.  
Fig. 7 illustrates the algorithm for the erase opera-  
tion. Refer to the Erase and Program Operations  
tables in the AC Characteristics section for parame-  
ters, and Fig. 21 section for timing diagrams.  
Autoselect during Erase-Suspend- Read  
Mode  
ERASE SUSPEND/ERASE RESUME  
In the erase-suspend-read mode, the system can  
also issue the autoselected command sequence.  
Refer to the Autoselect Mode and Autoselect Com-  
mand Sequence section for details (Table 5).  
An erase operation is a long-time operation so that  
two useful commands are provided in the  
ES29LV800 device Erase Suspend and Erase  
Resume Commands. Through the two commands,  
erase operation can be suspended for a while and  
the suspended operation can be resumed later when  
it is required. While the erase is suspended, read or  
program operations can be performed by the system.  
Erase Resume Command  
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.  
Erase Suspend Command, (B0h)  
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 dur-  
ing the sector erase operation, including the 50us  
time-out period during the sector erase command  
sequence. The Erase Suspend command is ignored  
if written during the chip erase operation or Embed-  
ded Program algorithm. When the Erase Suspend  
command is written during the sector erase opera-  
tion, the device requires a maximum of 20us to sus-  
pend the erase operation. However, when the Erase  
Suspend command is written during the sector erase  
time-out, the device immediately terminates the time-  
out period and suspends the erase operation.  
Read and Program during Erase-Suspend-  
Read Mode  
After the erase operation has been suspended, the  
device enters the erase-suspend-read mode. The  
system can read data from or program data to any  
sector not selected for erasure. (The device “erase  
suspends” all sectors selected for erasure.)  
Reading at any address within erase-suspended sec-  
tors produces 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 sec-  
tion for information on these status bits (Table 6).  
20  
Rev. 1D January 5, 2006  
ES29LV800D  
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