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M29W320DB70ZE6 参数 Datasheet PDF下载

M29W320DB70ZE6图片预览
型号: M29W320DB70ZE6
PDF下载: 下载PDF文件 查看货源
内容描述: 32兆位( 4Mbx8或2Mbx16 ,非均匀参数块,引导块) 3V供应闪存 [32 Mbit (4Mbx8 or 2Mbx16, Non-uniform Parameter Blocks, Boot Block), 3V Supply Flash memory]
分类和应用: 闪存存储
文件页数/大小: 56 页 / 1058 K
品牌: NUMONYX [ NUMONYX B.V ]
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Common Flash Interface (CFI)  
M29W320DT, M29W320DB  
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 21, Table 22, Table 23, Table 24, Table 25 and  
Table 26 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 26, 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 21. Query Structure Overview  
Address  
Sub-section Name  
Description  
x16  
x8  
10h  
1Bh  
27h  
20h CFI Query Identification String  
36h System Interface Information  
4Eh Device Geometry Definition  
Command set ID and algorithm data offset  
Device timing & voltage information  
Flash device layout  
Additional information specific to the Primary  
Algorithm (optional)  
40h  
61h  
80h Primary Algorithm-specific Extended Query table  
C2h Security Code Area  
64 bit unique device number  
1. Query data are always presented on the lowest order data outputs.  
(1)  
Table 22. CFI Query Identification String  
Address  
Data  
Description  
Value  
x16  
x8  
10h  
11h  
12h  
13h  
14h  
15h  
16h  
17h  
18h  
19h  
1Ah  
20h  
22h  
24h  
26h  
28h  
2Ah  
2Ch  
2Eh  
30h  
32h  
34h  
0051h  
“Q”  
"R"  
"Y"  
0052h Query Unique ASCII String "QRY"  
0059h  
0002h  
Primary Algorithm Command Set and Control Interface ID code 16 bit  
ID code defining a specific algorithm  
AMD Compatible  
0000h  
0040h  
Address for Primary Algorithm extended Query table (see Table 24)  
P = 40h  
NA  
0000h  
0000h  
Alternate Vendor Command Set and Control Interface ID Code  
second vendor - specified algorithm supported  
0000h  
0000h  
Address for Alternate Algorithm extended Query table  
0000h  
NA  
1. Query data are always presented on the lowest order data outputs (DQ7-DQ0) only. DQ8-DQ15 are ‘0’.  
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