S71GS256 datasheet(52/195 Pages) SPANSION

52 / 195 page

S29GLxxxN MirrorBitTM Flash Family

S29GLxxxN_MCP_A1 December 15, 2004

Advan ce

In form ati o n

Autoselect Mode

The autoselect mode provides manufacturer and device identification, and sector

group protection verification, through identifier codes output on DQ7–DQ0. This

mode is primarily intended for programming equipment to automatically match a

device to be programmed with its corresponding programming algorithm. How-

ever, the autoselect codes can also be accessed in-system through the command

When using programming equipment, the autoselect mode requires VID on ad-

dress pin A9. Address pins A6, A3, A2, A1, and A0 must be as shown in Table 5.

In addition, when verifying sector protection, the sector address must appear on

the appropriate highest order address bits (see Table 2). Table 5 shows the re-

maining address bits that are don’t care. When all necessary bits have been set

as required, the programming equipment may then read the corresponding iden-

tifier code on DQ7–DQ0.

To access the autoselect codes in-system, the host system can issue the autose-

lect command via the command register, as shown in Table 12. This method does

not require VID. Refer to the Autoselect Command Sequence section for more

information.

SA123

128/64

07B0000–07BFFFF

SA124

128/64

07C0000–07CFFFF

SA125

128/64

07D0000–07DFFFF

SA126

128/64

07E0000–07EFFFF

SA127

128/64

07F0000–07FFFFF

Table 4. Sector Address Table–S29GL128N (Continued)

Sector

A22–A16

Sector Size

(Kbytes/

Kwords)

Address Range

(in hexadecimal)

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