m29dw128g60nf6e Numonyx, m29dw128g60nf6e Datasheet - Page 73

• Manufacturer Part Number: m29dw128g60nf6e
• Description: 128-mbit 8 Mbit X16, Multiple Bank, Page, Dual Boot 3 V Supply Flash Memory
• Manufacturer: Numonyx

M29DW128G
Appendix B
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.
addresses (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
only in read mode by the final user. It is impossible to change the security number after it has been
written by Numonyx.
Table 32.
1. Query data are always presented on the lowest order data outputs.
Table 33.
1. Query data are always presented on the lowest order data outputs (DQ7-DQ0) only. DQ8-DQ15 are ‘0’.
Address
Address
1Bh
1Ah
10h
27h
40h
61h
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
CFI query identification string
System interface information
Device geometry definition
Primary algorithm-specific extended query
table
Security code area
Query structure overview
CFI query identification string
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
Data
Query unique ASCII string ‘QRY’
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
Alternate vendor command set and control interface ID code second
vendor - specified algorithm supported
Address for alternate algorithm extended query table
Sub-section name
Common flash interface (CFI)
Table
32,
(1)
Table
(1)
Table 37: Security code
33,
Description
Table
Command set ID and algorithm data offset
Device timing & voltage information
Flash device layout
Additional information specific to the primary
algorithm (optional)
64-bit unique device number
34,
Table
35,
area). This area can be accessed
Table 36
Common flash interface (CFI)
Table
Description
36)
and
Table 37
compatible
Spansion
P = 40h
show the
Value
NA
NA
‘Q’
‘R’
‘Y’
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