M29W128GH60N6E View Datasheet(PDF) - Numonyx -> Micron
Part Name
Description
MFG CO.
M29W128GH60N6E
Numonyx -> Micron
'M29W128GH60N6E' PDF : 94 Pages View PDF
Common Flash interface (CFI)
M29W128GH, M29W128GL
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 Read CFI Query command is issued, the memory enters Read CFI Query mode and read
operations output the CFI data. Table 35, Table 36, Table 37, Table 38, Table 39 and Table 40 show the
addresses (A-1, A0-A7) 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 40: 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.
Table 35. Query structure overview(1)
Address
x 16 x 8
Sub-section name
Description
10h 20h CFI query identification string
Command set ID and algorithm data offset
1Bh 36h System interface information
Device timing & voltage information
27h 4Eh Device geometry definition
Flash device layout
40h
80h
Primary algorithm-specific extended query table
Additional information specific to the primary
algorithm (optional)
61h C2h Security code area
64 bit unique device number
1. Query data are always presented on the lowest order data outputs.
Table 36. CFI query identification string(1)
Address
x 16 x 8
Data
Description
Value
10h 20h 0051h
‘Q’
11h 22h 0052h Query Unique ASCII String ‘QRY’
‘R’
12h 24h
13h 26h
14h 28h
15h 2Ah
16h 2Ch
0059h
0002h
0000h
0040h
0000h
Primary algorithm command set and control interface ID code 16 bit
ID code defining a specific algorithm
Address for primary algorithm extended query table (see Table 39)
‘Y’
AMD
compatible
P = 40h
17h 2Eh
18h 30h
0000h Alternate vendor command set and control interface ID code second
0000h vendor - specified algorithm supported
NA
19h 32h 0000h
Address for alternate algorithm extended query table
NA
1Ah 34h 0000h
1. Query data are always presented on the lowest order data outputs (DQ7-DQ0) only. DQ8-DQ15 are ‘0’.
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