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M29W800DT45ZE6E 参数 Datasheet PDF下载

M29W800DT45ZE6E图片预览
型号: M29W800DT45ZE6E
PDF下载: 下载PDF文件 查看货源
内容描述: 8兆位( 1兆位×8或512千位×16 ,引导块) 3 V电源快闪记忆体 [8-Mbit (1 Mbit x 8 or 512 Kbits x 16, boot block) 3 V supply flash memory]
分类和应用:
文件页数/大小: 52 页 / 1105 K
品牌: NUMONYX [ NUMONYX B.V ]
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M29W800DT, M29W800DB  
Common flash interface (CFI)  
Appendix B  
Common flash interface (CFI)  
The common flash interface is a JEDEC approved, standardized data structure that can be  
read from the flash memory device. It allows a system software to query the device to  
determine various electrical and timing parameters, density information and functions  
supported by the memory. The system can interface easily with the device, enabling the  
software to upgrade itself when necessary.  
When the CFI Query command is issued the device enters CFI query mode and the data  
structure is read from the memory. Table 22, Table 23, Table 24, Table 25, Table 26 and  
Table 27 show the addresses used to retrieve the data.  
The CFI data structure also contains a security area where a 64-bit unique security number  
is written (see Table 27: Security code area). This area can be accessed only in read mode  
by the final user. It is impossible to change the security number after it has been written by  
Numonyx. Issue a Read command to return to read mode.  
(1)  
Table 22. Query structure overview  
Address  
Sub-section name  
Description  
x 16  
x 8  
10h  
1Bh  
27h  
20h  
36h  
4Eh  
CFI query identification string  
System interface information  
Device geometry definition  
Command set ID and algorithm data offset  
Device timing & voltage information  
Flash device layout  
Primary algorithm-specific extended Additional information specific to the  
40h  
61h  
80h  
query table  
primary algorithm (optional)  
C2h Security code area  
64-bit unique device number  
1. Query data are always presented on the lowest order data outputs.  
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