S29GL01GP
S29GL512P
S29GL256P
S29GL128P
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 Table ). 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 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 .
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 VID after power-up sequence is completed. In addition, it is recommended that A9 apply from VID
to VIH/VIL before power-down the VCC/VIO.
See Table on page 65 for command sequence details.
When verifying sector protection, the sector address must appear on the appropriate highest order address bits (see Table to
Table ). 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.
Document Number: 002-00886 Rev. *B
Page 17 of 83
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