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AM29BDS320GTC9VMI 参数 Datasheet PDF下载

AM29BDS320GTC9VMI图片预览
型号: AM29BDS320GTC9VMI
PDF下载: 下载PDF文件 查看货源
内容描述: 32兆位(2M ×16位) , 1.8伏只同时读/写,突发模式闪存 [32 Megabit (2 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory]
分类和应用: 闪存
文件页数/大小: 74 页 / 1108 K
品牌: SPANSION [ SPANSION ]
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P r e l i m i n a r y  
DQ6: Toggle Bit I  
Toggle Bit I on DQ6 indicates whether an Embedded Program or Erase algorithm  
is in progress or complete, or whether the device has entered the Erase Suspend  
mode. Toggle Bit I may be read at any address in the same bank, and is valid  
after the rising edge of the final WE# pulse in the command sequence (prior to  
the program or erase operation), and during the sector erase time-out.  
During an Embedded Program or Erase algorithm operation, successive read cy-  
cles to any address cause DQ6 to toggle. When the operation is complete, DQ6  
stops toggling.  
After an erase command sequence is written, if all sectors selected for erasing  
are protected, DQ6 toggles for approximately 100 µs, then returns to reading  
array data. If not all selected sectors are protected, the Embedded Erase algo-  
rithm erases the unprotected sectors, and ignores the selected sectors that are  
protected.  
The system can use DQ6 and DQ2 together to determine whether a sector is ac-  
tively erasing or is erase-suspended. When the device is actively erasing (that is,  
the Embedded Erase algorithm is in progress), DQ6 toggles. When the device en-  
ters the Erase Suspend mode, DQ6 stops toggling. However, the system must  
also use DQ2 to determine which sectors are erasing or erase-suspended. Alter-  
natively, the system can use DQ7 (see the subsection on DQ7: Data# Polling).  
If a program address falls within a protected sector, DQ6 toggles for approxi-  
mately 1 ms after the program command sequence is written, then returns to  
reading array data.  
DQ6 also toggles during the erase-suspend-program mode, and stops toggling  
once the Embedded Program algorithm is complete.  
See the following for additional information: Figure 4 (toggle bit flowchart), DQ6:  
Toggle Bit  
I
(description), Figure 28, Toggle Bit Timings  
(During Embedded Algorithm),on page 64 (toggle bit timing diagram), and  
Table 15, “DQ6 and DQ2 Indications,on page 41.  
October 1, 2003 27243B1  
Am29BDS320G  
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