m58wr032et STMicroelectronics, m58wr032et Datasheet - Page 56

• Manufacturer Part Number: m58wr032et
• Description: 32 Mbit 2mb X 16, Multiple Bank, Burst 1.8v Supply Flash Memory
• Manufacturer: STMicroelectronics

M58WR032ET, M58WR032EB
APPENDIX B. COMMON FLASH INTERFACE
The Common Flash Interface is a JEDEC ap-
proved, 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 mem-
ory. The system can interface easily with the de-
vice, enabling the software to upgrade itself when
necessary.
When the Read CFI Query Command is issued
the device enters CFI Query mode and the data
structure is read from the memory. Tables 30, 31,
32, 33, 34, 35, 36, 37,
Table 30. Query Structure Overview
Note: The Flash memory display the CFI data structure when CFI Query command is issued. In this table are listed the main sub-sections
Table 31. CFI Query Identification String
56/81
Offset
04h-0Fh
Offset
1Bh
00h
10h
27h
80h
1Ah
00h
01h
02h
03h
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
P
A
detailed in Tables 31, 32,
Reserved
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific Extended Query table
Alternate Algorithm-specific Extended Query table
Security Code Area
Sub-section Name
offset = P = 0039h
value = A = 0000h
reserved
reserved
reserved
0020h
8814h
8815h
0051h
0052h
0059h
0003h
0000h
0000h
0000h
0000h
0000h
33
38
Sub-section Name
and 34. Query data is always presented on the lowest order data outputs.
and
39
Manufacturer Code
Device Code
Reserved
Reserved
Reserved
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
show the ad-
dresses used to retrieve the data. The Query data
is always presented on the lowest order data out-
puts (DQ0-DQ7), the other outputs (DQ8-DQ15)
are set to 0.
The CFI data structure also contains a security
area where a 64 bit unique security number is writ-
ten (see
Register Memory
ed only in Read mode by the final user. It is impos-
sible to change the security number after it has
been written by ST. Issue a Read Array command
to return to Read mode.
Reserved for algorithm-specific information
Command set ID and algorithm data offset
Device timing & voltage information
Flash device layout
Additional information specific to the Primary
Algorithm (optional)
Additional information specific to the Alternate
Algorithm (optional)
Lock Protection Register
Unique device Number and
User Programmable OTP
Description
Figure 5., Security Block and Protection
Map). This area can be access-
Description
Table
34.)
p = 39h
Bottom
Value
Top
"Q"
"R"
"Y"
NA
NA
ST