M59DR032 データシートの表示（PDF） - STMicroelectronics

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M59DR032

32 Mbit (2Mb x16, Dual Bank, Page) 1.8V Supply Flash Memory

STMicroelectronics 

M59DR032A, M59DR032B

COMMON FLASH INTERFACE (CFI)

The Common Flash Interface (CFI) specification is

a JEDEC approved, standardised data structure

that can be read from the Flash memory device.

CFI allows a system software to query the flash

device to determine various electrical and timing

parameters, density information and functions

supported by the device. CFI allows the system to

easily interface to the Flash memory, to learn

about its features and parameters, enabling the

software to configure itself when necessary.

Tables 18, 19, 20 and 21 show the address used

to retrieve each data.

The CFI data structure gives information on the

device, such as the sectorization, the command

set and some electrical specifications. Tables 18,

19, 20 and 21 show the addresses used to retrieve

each data. The CFI data structure contains also a

security area; in this section, a 64 bit unique secu-

rity number is written, starting at address 81h. This

area can be accessed only in read mode and there

are no ways of changing the code after it has been

written by ST. Write a read instruction to return to

Read mode. Refer to the CFI Query instruction to

understand how the M59DR032 enters the CFI

Query mode.

Table 18. 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)

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

detailled in Tables 19, 20 and 21. Query data are always presented on the lowest order data outputs.

Table 19. CFI Query Identification String

Offset

Data

Description

00h

0020h

Manufacturer Code

01h

00A1h - bottom

00A0h - top

Device Code

02h-0Fh

reserved

Reserved

10h

0051h

Query Unique ASCII String "QRY"

11h

0052h

Query Unique ASCII String "QRY"

12h

0059h

Query Unique ASCII String "QRY"

13h

0002h

Primary Algorithm Command Set and Control Interface ID code 16 bit ID code

14h

0000h

defining a specific algorithm

15h

offset = P = 0040h

Address for Primary Algorithm extended Query table

16h

0000h

17h

0000h

Alternate Vendor Command Set and Control Interface ID Code second vendor

18h

0000h

- specified algorithm supported (note: 0000h means none exists)

19h

value = A = 0000h Address for Alternate Algorithm extended Query table

1Ah

0000h

note: 0000h means none exists

Note: Query data are always presented on the lowest - order data outputs (DQ7-DQ0) only. DQ8-DQ15 are ‘0’.

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