S71GS256 datasheet(62/195 Pages) SPANSION

62 / 195 page

S29GLxxxN MirrorBitTM Flash Family

S29GLxxxN_MCP_A1 December 15, 2004

Advan ce

In form ati o n

then be device-independent, JEDEC ID-independent, and forward- and back-

ward-compatible for the specified flash device families. Flash vendors can

standardize their existing interfaces for long-term compatibility.

This device enters the CFI Query mode when the system writes the CFI Query

command, 98h, to address 55h, any time the device is ready to read array data.

The system can read CFI information at the addresses given in Tables 8-11. To

terminate reading CFI data, the system must write the reset command.

The system can also write the CFI query command when the device is in the au-

toselect mode. The device enters the CFI query mode, and the system can read

CFI data at the addresses given in Tables 8–11. The system must write the reset

command to return the device to reading array data.

For further information, please refer to the CFI Specification and CFI Publication

100, available via the World Wide Web at http://www.amd.com/flash/cfi. Alter-

natively, contact your sales representative for copies of these documents.

Table 8. CFI Query Identification String

Addresses

(x16)

Data

Description

10h

11h

12h

0051h

0052h

0059h

Query Unique ASCII string “QRY”

13h

14h

0002h

0000h

Primary OEM Command Set

15h

16h

0040h

0000h

Address for Primary Extended Table

17h

18h

0000h

Alternate OEM Command Set (00h = none exists)

19h

1Ah

0000h

Address for Alternate OEM Extended Table (00h = none exists)

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