M58WR064 STMICROELECTRONICS [STMicroelectronics], M58WR064 Datasheet - Page 58

• Manufacturer Part Number: M58WR064
• Description: 64 Mbit 4Mb x 16, Multiple Bank, Burst 1.8V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M58WR064ET, M58WR064EB
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,
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
58/82
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, 33, 34, 36 and 1. Query data is always presented on the lowest order data outputs.
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
8810h
8811h
0051h
0052h
0059h
0003h
0000h
0000h
0000h
0000h
0000h
Sub-section Name
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 Table 33)
Alternate Vendor Command Set and Control Interface ID Code
second vendor - specified algorithm supported
Address for Alternate Algorithm extended Query table
32, 33, 34, 36 and 1 show the addresses used to
retrieve the data. The Query data is always pre-
sented on the lowest order data outputs (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 Table 1, Security Code area). This area
can be accessed only in Read mode by the final
user. It is impossible to change the security num-
ber 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
Description
p = 39h
Bottom
Value
Top
"Q"
"R"
"Y"
NA
NA
ST