Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

M29W320DT Datasheet(PDF) 44 Page - STMicroelectronics

Part No. M29W320DT
Description  32 Mbit 4Mb x8 or 2Mb x16, Boot Block 3V Supply Flash Memory
Download  56 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo 

M29W320DT Datasheet(HTML) 44 Page - STMicroelectronics

Zoom Inzoom in Zoom Outzoom out
 44 / 56 page
background image
Common Flash Interface (CFI)
M29W320DT, M29W320DB
44/56
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 CFI Query Command is issued the device enters CFI Query mode and the data
structure is read from the memory. Table 21, Table 22, Table 23, Table 24, Table 25 and
Table 26 show the addresses 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 26, 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 ST. Issue a Read command to
return to Read mode.
Table 21.
Query Structure Overview(1)
Address
Sub-section Name
Description
x16
x8
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 22.
CFI Query Identification String(1)
Address
Data
Description
Value
x16
x8
10h
20h
0051h
“Q”
11h
22h
0052h
Query Unique ASCII String "QRY"
"R"
12h
24h
0059h
"Y"
13h
26h
0002h
Primary Algorithm Command Set and Control Interface ID code 16 bit
ID code defining a specific algorithm
AMD Compatible
14h
28h
0000h
15h
2Ah
0040h
Address for Primary Algorithm extended Query table (see
Table 24)P = 40h
16h
2Ch
0000h
17h
2Eh
0000h
Alternate Vendor Command Set and Control Interface ID Code
second vendor - specified algorithm supported
NA
18h
30h
0000h
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’.


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn