M29F200FT55N6F2 View Datasheet(PDF) - Micron Technology
Part Name
Description
Manufacturer
M29F200FT55N6F2 Datasheet PDF : 55 Pages
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M29FxxxFT/B
Common Flash Interface (CFI)
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 func-
tions supported by the memory. The system can interface easily with the device, ena-
bling the software to upgrade itself when necessary.
When the CFI Query Command is issued the device enters CFI Query mode and the da-
ta structure is read from the memory. Addresses used to retrieve the data are shown in
the following tables:
The CFI data structure also contains a security area where a 64-bit unique security
number is written. 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 Micron. Issue a
Read command to return to Read mode.
Table 9: Query Structure Overview
Address
x16
x8
10h
20h
1Bh
36h
27h
4Eh
40h
80h
61h
C2h
Sub-section Name
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific Extended Query
table
Security Code Area
Description
Command set ID and algorithm data offset
Device timing & voltage information
Flash device layout
Additional information specific to the Pri-
mary Algorithm (optional)
64 bit unique device number
Note: 1. Query data are always presented on the lowest order data outputs.
Table 10: CFI Query Identification String
Address
x16
x8
10h
20h
11h
22h
12h
24h
13h
26h
14h
28h
15h
2Ah
16h
2Ch
17h
2Eh
18h
30h
19h
32h
1Ah
34h
Data
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
Description
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
the Device Geometry table.)
Alternate Vendor Command Set and Control Interface ID
Code second vendor - specified algorithm supported
Address for Alternate Algorithm extended Query table
Value
"Q"
"R"
"Y"
AMD
Compatible
P = 40h
NA
NA
Note: 1. Query data are always presented on the lowest order data outputs (DQ7-DQ0) only.
DQ8-DQ15 are ‘0’.
PDF: 09005aef845656da
m29fxxxf/t_2mb-16mb.pdf - Rev. B 2/14 EN
40
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