D a t a
S h e e t
Autoselect Mode
The autoselect mode provides manufacturer and device identification, and sector group pro-
tection verification, through identifier codes output on DQ7–DQ0. This mode is primarily
intended for programming equipment to automatically match a device to be programmed
with its corresponding programming algorithm. However, the autoselect codes can also be ac-
cessed in-system through the command register.
When using programming equipment, the autoselect mode requires VID on address pin A9.
Address pins A6, A3, A2, A1, and A0 must be as shown in
In addition,
when verifying sector protection, the sector address must appear on the appropriate highest
order address bits (see
shows the remaining address
bits 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.
To access the autoselect codes in-system, the host system can issue the autoselect command
via the command register, as shown in
and
This
method does not require V
ID
. Refer to the
for more information.
Table 5.
Description
CE#
OE#
A22t
WE#
o
A15
H
X
Autoselect Codes (High Voltage Method)
A14
to
A10
X
A9
A8
to
A7
X
A6
A5
to
A4
X
A3
to
A2
L
L
DQ8 to DQ15
A1
A0
BYTE#
= V
IH
00
22
22
22
22
22
22
22
22
22
X
BYTE#
= V
IL
X
X
X
X
X
X
X
X
X
X
X
DQ7 to DQ0
Manufacturer ID:
Spansion Product
Device ID
Device ID
Device ID
S29GL128N S29GL256N S29GL512N
Cycle 1
Cycle 2
Cycle 3
Cycle 1
Cycle 2
Cycle 3
Cycle 1
Cycle 2
Cycle 3
L
L
V
ID
L
L
L
H
H
L
H
H
L
H
H
H
L
H
L
H
H
L
H
H
L
H
L
01h
7Eh
23h
01h
7Eh
22h
01h
7Eh
21h
01h
01h (protected),
00h (unprotected)
98h (factory locked),
18h (not factory locked)
L
L
H
X
X
V
ID
X
L
X
H
H
L
L
L
H
X
X
V
ID
X
L
X
H
H
L
L
L
H
X
X
V
ID
X
L
X
H
H
Sector Group
Protection Verification
Secured Silicon Sector
Indicator Bit (DQ7),
WP# protects highest
address sector
Secured Silicon Sector
Indicator Bit (DQ7),
WP# protects lowest
address sector
L
L
H
SA
X
V
ID
X
L
X
L
L
L
H
X
X
V
ID
X
L
X
L
H
H
X
X
L
L
H
X
X
V
ID
X
L
X
L
H
H
X
X
88h (factory locked),
08h (not factory locked)
Legend:
L = Logic Low = V
IL
, H = Logic High = V
IH
, SA = Sector Address, X = Don’t care.
S29GL-N_00_B3 October 13, 2006
S29GL-N MirrorBit™ Flash Family
37
SPANSION [ SPANSION ]
