M29DW641F70N1 NUMONYX [Numonyx B.V], M29DW641F70N1 Datasheet - Page 66

• Manufacturer Part Number: M29DW641F70N1
• Description: 64 Mbit (4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
• Manufacturer: NUMONYX [Numonyx B.V]

Common Flash Interface (CFI)
Appendix B
66/80
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 Read CFI Query command is issued the addressed bank enters Read CFI Query
mode and Read Operations in the same bank (A21-A19) output the CFI data.
Table 30
retrieve the data.
The CFI data structure also contains a security area where a 64 bit unique security number
is written (see
mode by the final user. It is impossible to change the security number after it has been
written by Numonyx.
Table 29.
1. Query data are always presented on the lowest order data outputs.
Table 30.
1. Query data are always presented on the lowest order data outputs (DQ7-DQ0) only. DQ8-DQ15 are ‘0’.
Address
Address
1Bh
10h
27h
40h
61h
1Ah
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
,
Table 31
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific Extended
Query table
Security Code Area
Common Flash Interface (CFI)
Query structure overview
CFI Query Identification String
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
Table 34: Security Code Area
Data
,
Table 32
Sub-section name
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
Table 33
Alternate Vendor Command Set and Control Interface ID
Code second vendor - specified algorithm supported
Address for Alternate Algorithm extended Query table
,
Table 33
)
and
Table 34
). This area can be accessed only in Read
Description
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
show the addresses (A0-A10) used to
Description
Table 29
M29DW641F
Compatible
P = 40h
Value
AMD
“Q”
"R"
"Y"
NA
NA
,