M29W320EB NUMONYX [Numonyx B.V], M29W320EB Datasheet - Page 50

• Manufacturer Part Number: M29W320EB
• Description: 32 Mbit (4Mbx8 or 2Mbx16, Uniform Parameter Blocks, Boot Block) 3V supply Flash memory
• Manufacturer: NUMONYX [Numonyx B.V]

Common Flash Interface (CFI)
Appendix B
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.
retrieve the data.
The CFI data structure also contains a security area where a 64 bit unique security number is written
(see
impossible to change the security number after it has been written by Numonyx.
Table 22.
1. Query data are always presented on the lowest order data outputs.
Table 23.
1. Query data are always presented on the lowest order data outputs (DQ7-DQ0) only. DQ8-DQ15 are ‘0’.
50/63
1Ah
x16
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Bh
Address
x16
10h
27h
40h
61h
Table 27: Security code
Address
Table
2Ah
2Ch
2Eh
20h
22h
24h
26h
28h
30h
32h
34h
x8
Query Structure Overview
CFI Query Identification String
22,
4Eh
C2h
36h
80h
20h
x8
Table
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
Data
23,
Common Flash Interface (CFI)
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific extended
Query table
Security code area
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
Alternate Vendor Command Set and Control Interface ID code second
vendor - specified algorithm supported
Address for Alternate Algorithm extended Query table
Table
area). This area can be accessed only in Read mode by the final user. It is
24,
Sub-section name
Table
(1)
25,
(1)
Table 26
Description
and
Table 27
Flash device layout
64 bit unique device number
Command set ID and algorithm data offset
Device timing & voltage information
Additional information specific to the Primary
Algorithm (optional)
show the addresses used to
M29W320ET, M29W320EB
Description
Table 26
)
Compatible
P = 40h
Value
AMD
“Q”
"R"
"Y"
NA
NA