S29GL256P90FFIR20 Spansion Inc., S29GL256P90FFIR20 Datasheet - Page 21

• Manufacturer Part Number: S29GL256P90FFIR20
• Description: IC 256M PAGE-MODE FLASH MEMORY
• Manufacturer: Spansion Inc.

7.6
November 17, 2010 S29GL-P_00_A13
Autoselect
The Autoselect mode provides manufacturer ID, Device identification, and sector protection information,
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
in-system.
There are two methods to access autoselect codes. One uses the autoselect command, the other applies V
on address pin A9.
When using programming equipment, the autoselect mode requires V
Address pins must be as shown in
 To access Autoselect mode without using high voltage on A9, the host system must issue the Autoselect
 The Autoselect command sequence may be written to an address within a sector that is either in the read
 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
 It is recommended that A9 apply V
 See
 When verifying sector protection, the sector address must appear on the appropriate highest order address
command.
or erase-suspend-read mode.
sector was previously in Erase Suspend).
that A9 apply from V
bits (see
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.
Table 12.1 on page 69
Table 7.4
to
ID
Table
D a t a
to V
S29GL-P MirrorBit
IH
for command sequence details.
7.5). The remaining address bits are don't care. When all necessary bits have
/V
IL
Table
S h e e t
before power-down the V
ID
after power-up sequence is completed. In addition, it is recommended
7.2.
®
Flash Family
Table
7.3). The Autoselect codes can also be accessed
CC
/V
IO
.
ID
(11.5 V to 12.5 V) on address pin A9.
21
ID