M29W320DT NUMONYX [Numonyx B.V], M29W320DT Datasheet - Page 44

• Manufacturer Part Number: M29W320DT
• Description: 32 Mbit (4Mbx8 or 2Mbx16, Non-uniform Parameter Blocks, Boot Block), 3V Supply Flash memory
• Manufacturer: NUMONYX [Numonyx B.V]

Common Flash Interface (CFI)
Appendix B
Table 21.
1. Query data are always presented on the lowest order data outputs.
Table 22.
1. Query data are always presented on the lowest order data outputs (DQ7-DQ0) only. DQ8-DQ15 are ‘0’.
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1Bh
x16
10h
27h
40h
61h
x16
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Ah
Address
Address
4Eh
C2h
20h
36h
80h
x8
2Ah
2Ch
2Eh
20h
22h
24h
26h
28h
30h
32h
34h
x8
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 26
a security area where a 64 bit unique security number is written (see
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 Numonyx. Issue a Read
command to return to Read mode.
Query Structure Overview
CFI Query Identification String
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific Extended Query table
Security Code Area
0040h
0000h Alternate Vendor Command Set and Control Interface ID Code
0000h
0051h
0052h Query Unique ASCII String "QRY"
0059h
0002h Primary Algorithm Command Set and Control Interface ID code 16 bit
0000h
0000h
0000h
0000h
Data
show the addresses used to retrieve the data. The CFI data structure also contains
ID code defining a specific algorithm
Address for Primary Algorithm extended Query table (see
second vendor - specified algorithm supported
Address for Alternate Algorithm extended Query table
Common Flash Interface (CFI)
Sub-section Name
(1)
(1)
Table
Description
21,
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
22,
Table
23,
M29W320DT, M29W320DB
Description
Table 24
Table
Table
24,
)
Table 25
26, Security
AMD Compatible
P = 40h
Value
“Q”
"R"
"Y"
NA
NA
and