Da ta
Shee t
(Prelimi nar y)
7.6
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
The Autoselect codes can also be accessed
in-system.
There are two methods to access autoselect codes. One uses the autoselect command, the other applies V
ID
on address pin A9.
When using programming equipment, the autoselect mode requires V
ID
(11.5 V to 12.5 V) on address pin A9.
Address pins must be as shown in
To access Autoselect mode without using high voltage on A9, 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).
It is recommended that A9 apply V
ID
after power-up sequence is completed. In addition, it is recommended
that A9 apply from V
ID
to V
IH
/V
IL
before power-down the V
CC
/V
IO
.
See
for command sequence details.
When verifying sector protection, the sector address must appear on the appropriate highest order address
bits (see
to
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.
November 8, 2007 S29GL-P_00_A7
S29GL-P MirrorBit
®
Flash Family
21
SPANSION [ SPANSION ]
