M58LW032D 데이터 시트보기 (PDF) - STMicroelectronics

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M58LW032D

32 Mbit (4Mb x8, 2Mb x16, Uniform Block) 3V Supply Flash Memory

STMicroelectronics 

M58LW032D

APPENDIX B. COMMON FLASH INTERFACE - CFI

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 CFI Query Command (RCFI) is issued

the device enters CFI Query mode and the data

structure is read from the memory. Tables 24, 25,

26, 27, 28 and 29 show the addresses used to re-

trieve the data.

Table 24. Query Structure Overview

Address

x16

x8(4)

Sub-section Name

Description

0000h

00h

Manufacturer Code

0001h

02h

Device Code

0010h

20h CFI Query Identification String

Command set ID and algorithm data offset

001Bh

36h System Interface Information

Device timing and voltage information

0027h

4Eh Device Geometry Definition

Flash memory layout

P(h)(1)

Primary Algorithm-specific Extended Additional information specific to the Primary

Query Table

Algorithm (optional)

A(h)(2)

Alternate Algorithm-specific Extended Additional information specific to the Alternate

Query Table

Algorithm (optional)

(SBA+02)h

Block Status Register

Block-related Information

Note: 1. Offset 15h defines P which points to the Primary Algorithm Extended Query Address Table.

2. Offset 19h defines A which points to the Alternate Algorithm Extended Query Address Table.

3. SBA is the Start Base Address for each block.

4. In x8 mode, A0 must be set to VIL, otherwise 00h will be output.

Table 25. CFI - Query Address and Data Output

Address

x16

x8(3)

Data

Description

0010h

20h

0011h

22h

0012h

24h

51h

"Q"

51h; "Q"

52h

"R" Query ASCII String 52h; "R"

59h; "Y"

59h

"Y"

0013h

26h

0014h

28h

01h

Primary Vendor:

00h

Command Set and Control Interface ID Code

0015h

2Ah

0016h

2Ch

31h

Primary algorithm extended Query Address Table: P(h)

00h

0017h

2Eh

0018h

30h

00h

Alternate Vendor:

00h

Command Set and Control Interface ID Code

0019h

32h

001Ah(2)

34h

00h

Alternate Algorithm Extended Query address Table

00h

Note: 1. Query Data are always presented on DQ7-DQ0. DQ15-DQ8 are set to '0'.

2. Offset 19h defines A which points to the Alternate Algorithm Extended Query Address Table.

3. In x8 mode, A0 must be set to VIL, otherwise 00h will be output.

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