QUERY STRUCTURE OVERVIEW
The QUERY command makes the Flash component
display the CFI query structure or data base. The struc-
ture subsections and address locations are outlined in
Table 7.
128Mb, 64Mb, 32Mb
Q-FLASH MEMORY
Table 6
Example of Query Structure Output of a x16- and x8-Capable Device
OFFSET
A16–A1
0010h
0011h
0012h
0013h
0014h
0015h
0016h
0017h
0018h
...
WORD ADDRESSING
HEX CODE
VALUE
DQ15–DQ0
0051
Q
0052
R
0059
Y
P_ID LO
PrVendor
P_ID HI
ID #
P LO
PrVendor
P HI
TblAdr
A_ID LO
AltVendor
A_ID HI
ID #
...
...
OFFSET
A7–A0
20h
21h
22h
23h
24h
25h
26h
27h
28h
...
BYTE ADDRESSING
HEX CODE
VALUE
DQ7–DQ0
51
Q
51
Q
52
R
52
R
59
Y
59
Y
P_ID LO
PrVendor
P_ID LO
PrVendor
P_ID HI
ID #
...
...
Table 7
Query Structure1
OFFSET
00h
01h
(BA+2)h2
04–0Fh
10h
1Bh
27h
P3
SUBSECTION NAME
Block Status Register
Reserved
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Extended Query Table
DESCRIPTION
Manufacturer compatibility code
Device code
Block-specific information
Reserved for vendor-specific information
Reserved for vendor-specific information
Command set ID and vendor data offset
Flash device layout
Vendor-defined additional information specific to the
primary vendor algorithm
NOTE:
1. Refer to the Query Structure Output section and offset 28h for the detailed definition of offset address as a function
of device bus width and mode.
2. BA = Block address beginning location (i.e., 020000h is block two’s beginning location when the block size is 64K-word).
3. Offset 15 defines “P,” which points to the Primary Extended Query Table.
128Mb, 64Mb, 32Mb Q-Flash Memory
MT28F640J3_7.p65 – Rev. 6, Pub. 8/02
14
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2002, Micron Technology, Inc.