QUERY STRUCTURE OVERVIEW
The Query command causes the flash component
to display the Common Flash Interface (CFI) Query
structure or “database.” The structure sub-sections
and address locations are summarized in Table 8.
The following sections describe the Query structure
sub-sections in detail.
Table 6. Query Structure(1)
00h Manufacturer Code
01h Device Code
(BA+2)h(2) Block Status Register
Reserved for vendor-specific information
10h CFI Query Identification String
Command set ID and vendor data offset
1Bh System Interface Information
Device timing & voltage information
27h Device Geometry Definition
Flash device layout
Primary Intel-specific Extended Query
Vendor-defined additional information
specific to the Primary Vendor Algorithm
1. Refer to Section 4.2.1 and Table 4 for the detailed definition of offset address as a function of device word width and mode.
2. BA = The beginning location of a Block Address (i.e., 08000h is the beginning location of block 1 when the block size is
3. Offset 15 defines “P” which points to the Primary Intel-specific Extended Query Table.
18 ADVANCE INFORMATION