M58WR064F-ZBE View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M58WR064F-ZBE

64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V Supply Flash Memory

STMicroelectronics 

M58WR064FT, M58WR064FB

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, 38 and 39 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 Figure 5., Protection Register Memory

Map). 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

ST. Issue a Read Array command to return to

Read mode.

Table 30. Query Structure Overview

Offset

Sub-section Name

Description

00h Reserved

Reserved for algorithm-specific information

10h CFI Query Identification String

Command set ID and algorithm data offset

1Bh System Interface Information

Device timing & voltage information

27h Device Geometry Definition

Flash device layout

P

Primary Algorithm-specific Extended Query table

Additional information specific to the Primary

Algorithm (optional)

A

Alternate Algorithm-specific Extended Query table

Additional information specific to the Alternate

Algorithm (optional)

80h Security Code Area

Lock Protection Register

Unique device Number and

User Programmable OTP

Note: The Flash memory display the CFI data structure when CFI Query command is issued. In this table are listed the main sub-sections

detailed in Tables 31, 32, 33 and 34. Query data is always presented on the lowest order data outputs.

Table 31. CFI Query Identification String

Offset Sub-section Name

Description

00h

0020h

Manufacturer Code

01h

8810h

8811h

Device Code

02h

reserved

Reserved

03h

reserved

Reserved

04h-0Fh

reserved

Reserved

10h

0051h

11h

0052h

Query Unique ASCII String "QRY"

12h

0059h

13h

0003h

Primary Algorithm Command Set and Control Interface

14h

0000h

ID code 16 bit ID code defining a specific algorithm

15h

offset = P = 0039h Address for Primary Algorithm extended Query table

16h

0000h

(see Table 34.)

17h

0000h

Alternate Vendor Command Set and Control Interface

18h

0000h

ID Code second vendor - specified algorithm supported

19h

value = A = 0000h

Address for Alternate Algorithm extended Query table

1Ah

0000h

Value

ST

Top (M58WR064FT)

Bottom (M58WR064FB)

"Q"

"R"

"Y"

p = 39h

NA

NA

62/87

Share Link: