AM29PDLI27H SPANSION [SPANSION], AM29PDLI27H Datasheet - Page 23

• Manufacturer Part Number: AM29PDLI27H
• Description: 128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Page Mode Simultaneous Read/Write Flash Memory with Enhanced VersatileIO Control
• Manufacturer: SPANSION [SPANSION]

Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equip-
ment to automatically match a device to be pro-
grammed with its corresponding programm ing
algorithm. However, the autoselect codes can also be
accessed in-system through the command register.
When using programming equipment, the autoselect
mode requires V
must be as shown in
ing sector protection, the sector address must appear
on the appropriate highest order address bits (see
June 30, 2003
Customer-Lockable Area
Factory-Locked Area
Am29PDL127H
Table 5.
ID
SecSi
on address pin A9. Address pins
Table
Sector Size
128 words
64 words
64 words
TM
Sector Addresses
6. In addition, when verify-
A D V A N C E
000000h–00007Fh
000000h-00003Fh
000040h-00007Fh
Address Range
Am29PDL127H
I N F O R M A T I O N
Table
that are don’t care. When all necessary bits have been
set as required, the programming equipment may then
read the corresponding identifier code on DQ7–DQ0.
However, the autoselect codes can also be accessed
in-system through the command register, for instances
when the device is erased or programmed in a system
without access to high voltage on the A9 pin. The
command sequence is illustrated in
that if a Bank Address (BA) on address bits A22–A20
is asserted during the third write cycle of the autose-
lect command, the host system can read autoselect
data that bank and then immediately read array data
from the other bank, without exiting the autoselect
mode.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in
does not require V
mand Sequence
4).
Table 6
section for more information.
shows the remaining address bits
ID
. Refer to the
Table
Autoselect Com-
13. This method
Table
13. Note
21