JS28F256P30B95A datasheet(71/97 Pages) MICRON

71 / 97 page

August 2008

Datasheet

Order Number: 306666-12

P30

Table 38: Example of CFI Structure Output of x16- Devices

A.1.2

CFI Structure Overview

The CFI command causes the flash component to display the Common Flash Interface

(CFI) CFI structure or “database.” The structure sub-sections and address locations are

summarized below.

Table 39: CFI Structure

Notes:

Refer to the CFI Structure Output section and offset 28h for the detailed definition of offset address as a function of device

bus width and mode.

BA = Block Address beginning location (i.e., 08000h is block 1’s beginning location when the block size is 32-KWord).

Offset 15 defines “P” which points to the Primary Numonyx-specific Extended CFI Table.

A.1.3

Read CFI Identification String

The Identification String provides verification that the component supports the

Common Flash Interface specification. It also indicates the specification version and

supported vendor-specified command set(s).

Table 40: CFI Identification

Word Addressing:

Byte Addressing:

Offset

Hex Code

Value

Offset

Hex Code

Value

AX–A0

D15–D0

AX–A0

D7–D0

00010h

0051

"Q"

00010h

"Q"

00011h

0052

"R"

00011h

"R"

00012h

0059

"Y"

00012h

"Y"

00013h

P_IDLO

PrVendor

00013h

P_IDLO

PrVendor

00014h

P_IDHI

ID #

00014h

P_IDLO

ID #

00015h

PLO

PrVendor

00015h

P_IDHI

ID #

00016h

PHI

TblAdr

00016h

...

00017h

A_IDLO

AltVendor

00017h

00018h

A_IDHI

ID #

00018h

...

Offset

Sub-Section Name

Description

(1)

00001-Fh Reserved

Reserved for vendor-specific information

00010h

CFI query identification string

Command set ID and vendor data offset

0001Bh

System interface information

Device timing & voltage information

00027h

Device geometry definition

Flash device layout

P(3)

Primary Intel-specific Extended Query Table

Vendor-defined additional information specific

to the Primary Vendor Algorithm

Offset

Length

Description

Add.

Hex

Code

Value

10h

Query-unique ASCII string “QRY“

10:

--51

"Q"

11:

--52

"R"

12:

--59

"Y"

13h

Primary vendor command set and control interface ID code.

13:

--01

16-bit ID code for vendor-specified algorithms

14:

--00

15h

Extended Query Table primary algorithm address

15:

--0A

16:

--01

17h

Alternate vendor command set and control interface ID code.

17:

--00

0000h means no second vendor-specified algorithm exists

18:

--00

19h

Secondary algorithm Extended Query Table address.

19:

--00

0000h means none exists

1A:

--00

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