S29GL-P datasheet(18/71 Pages) SPANSION

18 / 71 page

S29GL-P MirrorBit

TM Flash Family

S29GL-P_00_A3 November 21, 2006

Data

Sheet

(Adv an ce

Inf o r m a t io n)

7.6

Autoselect

The Autoselect mode provides manufacturer and device identification, and sector protection verification,

through identifier codes output from the internal register (separate from the memory array) on DQ7-DQ0. This

mode is primarily intended for programming equipment to automatically match a device to be programmed

with its corresponding programming algorithm (see Table 7.3). The Autoselect codes can also be accessed

in-system.

When verifying sector protection, the sector address must appear on the appropriate highest order address

bits (see Table 7.4 to Table 7.5). The remaining address bits are don't care. When all necessary bits have

been set as required, the programming equipment may then read the corresponding identifier code on DQ15-

DQ0. The Autoselect codes can also be accessed in-system through the command register.

There are two methods to access autoselect codes. One uses the autoselect command, the other applies VID

on address pin A9.

When using programming equipment, the autoselect mode requires VID (11.5 V to 12.5 V) on address pin A9.

Address pins must be as shown in Table 7.2.

To access the Autoselect codes, the host system must issue the Autoselect command.

The Autoselect command sequence may be written to an address within a sector that is either in the read

or erase-suspend-read mode.

The Autoselect command may not be written while the device is actively programming or erasing.

The system must write the reset command to return to the read mode (or erase-suspend-read mode if the

sector was previously in Erase Suspend).

See Table 12.1 on page 61 for command sequence details.

S29GL-P Datasheet(PDF) 18 Page - SPANSION